Obrazy na stronie

Septe, CA, Noss} Qualitative Analysis of Substances Insoluble in Water and Acids. 137 needles, which may be washed with cold water, pressed, chloric acid, and does not colour bisulphide of carbon and dried over sulphuric acid. The results of the analysis or chloroform. The black precipitate boiled in the soluof the crystals agree with the formula

tion in which it is produced quickly changes to yellow, T103,380, + NaO.Soz.

and among the yellow iodide of thallium bright yellow Sulphate of Thallic Oxide and Potash.—A

flakes of iodoform may be seen. mixed solution of thallic sulphate in dilute sulphuric acid and acid sulphate of potash becomes cloudy, and on the Qualitative Analysis of Substances Insoluble in after a time deposits a crust of hard, colourless crystals, Water and Acids, by CHAS. L. BLOXAM. having the composition T103,2SO3 + 2(KO,SO3). Oxalate of Peroxide of Thallium and Ama residue after treatment with water and acids is fused

In the ordinary course of qualitative analysis the insoluble monia.-Oxalate of ammonia added to a solution of either with carbonate of soda alone, or with the more thallic sulphate in dilute sulphuric acid gives a heavy, easily fusible mixture of carbonates of potash and soda. white precipitate, quite insoluble in cold water. When The fusion is generally effected in a platinum crucible or boiled in water, however, it dissolves, carbonic acid is evolved, and a salt of thallous oxide is formed. Dried tion of the blow-pipe flame.

on platinum foil, and often requires a prolonged applicain the air, the compound has the formula

It is necessary also to

submit the substance to a preliminary examination for T103, 3C,0, + NH,O,C,03 + 6 aq.

the easily reducible metals which would corrode the Heated to 100°, it becomes oxalate of thallium and platinum. When such metals are present, a porcelain oxalate of ammonia, and no longer contains a trace of crucible is employed, when the fused mass becomes conperoxide. On heating the double salt in a test-tube the taminated with silica and alumina derived from the metal is reduced, and is easily run into a single button. crucible, which is often so far carroded as to be useless.

Peroxide of thallium freely dissolves in nitric acid With an ordinary gas burner and blow-pipe it is not sp: gr; 1'4 when gently heated, and forms a clear easy to raise the porcelain crucible to the high temperathickish liquid, which may be diluted with a consider ture required for the fusion. able amount of water without becoming turbid. The A great saving of time and labour may be effected by concentrated solution yields well-formed crystals, which causing the heat to be applied inside the mass to be fused. must be separated from the mother liquor by pressure, For this purpose it is mixed with charcoal and nitre in since water decomposes them. They have the composi- such proportions that complete deflagration and con, tion T103,3 NO, + 6 aq.

sequent fusion will take place on applying a lighted Tartaric acid alone gives no precipitate with an acid match. The fusion may thus be effected in a thin porcesolution of sulphate or nitrate of peroxide of thallium, lain dish without the least injury to the glaze. If the but on the addition of ammonia a cheesy precipitate is dish be uniformly thin it is not cracked by the deflagraformed, which, on the further addition of ammonia and tion, but if such a dish be not at hand a clean iron sand. before the solution becomes alkaline, redissolves. On tray answers the purpose, the iron being not in the least boiling this solution the brown peroxide is deposited. affected by the deflagrating mixture. The charcoal

A solution of tartaric acid, boiled with the peroxide should, of course, be chosen so as to yield a very small of thallium, dissolves it with effervescence, carbonic and proportion of ash, and must be reduced to a fine formic acid being produced. The solution, on cooling, powder.* Chemically pure nitre is in common use in the deposits crystals of thallous tartrate.

laboratory. À solution of thallic sulphate gives, with a yellow

A mixture of one part by weight of charcoal with precipitate with chromate of potash, which decomposes six parts of nitre forms an excellent deflagrating.flux, when washed with water, thallic oxide being separated. and may be kept ready mixed for effecting the fusion of

A solution of thallic nitrate gives with ferrocyanide insoluble substances. The fused mass remaining after of potassium a greenish precipitate, with ferridcyanide the deflagration is very porous, and therefore easily disa yellow. These precipitates are insoluble in dilute integrated by water, whereas the mass obtained by the nitric acid.

ordinary process of fusion by external heat often rePhosphate of soda gives with thallic sulphate a white quires digestion with water for an hour or two in order slimy precipitate, which becomes yellowish on boiling to extract the soluble part. On the addition of ammonia, it dissolves, producing a

The following is the process which I have adopted for yellow liquid, from which thallic oxide is separated by the rapid examination of insoluble substances : Five boiling.

grains of the substance are intimately mixed with ten The ammoniacal solutions with phosphoric or tartaric grains of dried carbonate of soda, and seventy grains of acid just mentioned, on the addition of sulphide of am

the deflagrating flux.f The mixture is placed in a thin monium, or on passing sulphuretted hydrogen, give a porcelain dish, or clean iron tray, and a lighted match brown precipitate, which, on boiling, collects together, applied to the centre of the heap. The deflagration is forming a metallic-looking ball. After cooling, this is completed in two or three seconds, and a well fused hard, but it is easily fused by heat, and gives off sulphur. mass remains. This is easily detached from the cooled When boiled with dilute sulphuric

acid, the precipitate dish (in

which a little unburnt charcoal may be left) and dissolves, sulphuretted hydrogen being evolved, and boiled with water, being occasionally stirred with a glass sulphur separated. The precipitate is probably per- extraction of the soluble portion, which is then filtered

rod. Two or three minutes always suffice for the sulphide of thallium T1S2.

Iodide of potassium added to the ammonical tartrate off and examined as usual for acids, and for such bases solution gives a black precipitate, which is no doubt a

as are compatible in solution with the alkaline carbonates. periodide, since no iodine is liberated, and no iodide of The residue left by water, after having been washed, is nitrogen is found in the precipitate. When an excess

treated with acids and examined in the usual way. A of iodide of potassium is employed, a good deal of * Charcoal from the powder mills is most suitable for the purpose. thallium

remains in solution, and the Altrate is coloured but This greater part of it will of course pass off during the deflagrayellowish-red; this gives no precipitate with hydro- tion.

CHEMICAL News, 138 Examining Boards.

Sept. 22, 1865. little charcoal is generally left undissolved by acids, and

EXAMINING BOARDS. with it any of the substance which may have escaped decomposition. If it be thought necessary, the dried residue may be ignited until the charcoal is consumed,

UNIVERSITY OF LONDON. and the incombustible portion examined.

Examiners in Chemistry.-Dr. Debus; Professor William. The only substance which resisted the above mode

son, Unirersity College. of treatment was chrome iron ore, but this is not surpris- The University of London is not an educating body; it ing, since this mineral is only partially decomposed eren simply grants degrees. A knowledge of Chemistry is by prolonged fusion in the ordinary manner with the necessary for the Matriculation Examination. alkaline carbonates.

Heat-its sources. Expansion. Thermometers-relaQuartz sand was rendered almost completely soluble tions between different Scales in common use. Difference by this process, and by using twice the proportion of car- between Temperature and Quantity of Heat. Specific and bonate of soda it became entirely so.

latent heat. Calorimeters. Liquefaction. Ebullition. Pipe clay was completely Auxed. The aqueous solu- Evaporation. Conduction. Convection. Radiation. tion of the fused mass contained, of course, very little

Chemistry of the Non-Metallic Elements, including their silica or alumina, which were both found in the gelati- compounds as enumerated below their clief physical and nous residue dissolved by hydrochloric acid.

chemical characters—their preparation, and their charac

teristic tests. Fluorspar, one of the most troublesome substances under the ordinary mode of fusion,

is almost completely Iodine, Fluorine, Sulphur, Phosphorus, Silicon.

Oxygen, Hydrogen, Carbon, Nitrogen, Chlorine, Bromine, decomposed by the deflagration. The aqueous solution, Combining proportions by weight and by volume. when neutralised with acetic acid, and mixed with chlo- General nature of Acids, Bases, and Salts. Symbols and ride of calcium, gives an abundant precipitate of the cha- Nomenclature. racteristic fluoride of calcium.

The Atmosphere-its constitution ; effects of Animal Heavy spar is completely decomposed by the deflagra- and Vegetable life upon its composition. tion, yielding sulphates of the alkalies in the aqueous Combustion. Structure and properties of Flame. Nature solution, and a residue of carbonate of baryta perfectly and composition of ordinary Fuel. soluble in hydrochloric acid. This might be recom

Water-Chemical peculiarities of natural waters, such as mended as a convenient laboratory process for the pre

rain-water, rirer-water, spring-water, sea-water. paration of soluble baryta salts from heavy spar, since

Carbonic Acid. Oxides and Acids of Nitrogen. Ammonia. the commonest saltpetre, when dried, would answer the Olefiant Gas, Marsh Gas. Sulphurous and Sulphuric

Acids. Sulphuretted Hydrogen. purpose. Tinstone was also rendered in great measure soluble

Hydrochloric Acid. Phosphoric Acid and Phosphuby this mode of treatment. The aqueous solution con

retted Hydrogen. Silica.

In the Examination for Honours, the Candidate, not tained much stannic and silicic acids, whilst the residue more than twenty years of age, who sball most distinguish furnished a large quantity of soluble binoxide of tin on himself in Chemisiry will receive a Prize to the value of treatment with hydrochloric acid.

Ten Pounds in money or books. Flint glass was very completely decomposed, some of the lead separating in globules during the deflagra

DEGREE OF BACHELOR OF SCIENCE (B.Sc.). tion. The aqueous solution contained very little lead, and

This recently-instituted Degree is conferred on Candiabundance of silica. The portion left by water dissolved Mechanical and Natural Philosophy, Zoology, Animal

dates who pass a satisfactory Examination in Mathematics, in dilute nitric acid, leaving a few particles of charcoal. Physiology, Geology and Palæontology, and Chemistry.

Window-glass was also easily analysed in this way. For the first examination of the Candidate, a knowledge

Felspar was not so completely decomposed, though of Inorganic Chemistry only is necessary, including the abundance of silica and alumina could be detected in the following subjects : hydrochloric solution from the deflagrated mass.

Matter ; simple and compound. Chloride of silver was, of course, completely decom- Elementary bodies classed. Metallic and Non-Metallic posed, the silver separating in the metallic state.

bodies. Sulphate of lead was also completils decomposed,

Chemical combination and Mechanical mixture, Solu. with separation of some metallic lead. Alkaline sul- tion. phates were found in the aqueous solution.

Outlines of Crystallography. Isomorphism. DimorKryolite, as might be anticipated, was very easily de- phism. Allotropic conditions of matter. Chemical Affinity. composed, some of the aluminium being found together Laws of Combination by weight and by volume, as deduced with alkaline fluorides in the aqueous si’ution, while the from the history of the individual elements. Equivalent rest, as alumina, dissolved in hydrochloric acid.

numbers. Equivalent volumes. Symbolical notation. For

mulæ. Nomenclature. In cases where it is not desired to examine for sul.

Chemical actions produced under the influence of Heat. phates, a mixture of nitre with gunpower may be very Nature of Combustion. Structure and properties of Flame. advantageously substituted for the nitro and charcoal. Principles of Illumination. Chemical action of Light. The mixture being more powerful, allows the use of a Photography. larger proportion of carbonate of soda, thus ensuring Oxygen. Ozone. more complete decomposition. One part by weight of Hydrogen. Water. the insoluble substance may be mixed with four parts of Nitrogen. Chemical constitution of the Atmosphere. carbonate of soda, four parts of nitre, and ten parts of Diffusion of Gases. The Oxides of Nitrogen. Nitric Acid. finely powdered gunpowder.

Ammonia. I have examined all the above-mentioned substances

Chlorine, Bromine, and Iodine. Their compounds with by this process also with equally satisfactory results. Oxygen and Hydrogen. Theory of Bleaching. Journal of the Chemical Society, August, 1865.

Fluorine and Hydrofluoric Acid.

Sulphur. Sulphurous Acid. Manufacture and Chemical This method of treating insoluble substances was originally sug: applications of Sulphuric Acid. Other Oxygen compounds gested by Mr. Hadow's process for extracting the silver from old of Sulphur. Sulphuretted Hydrogen. photographic baths by deflagrating the precipitated chloride with saltpetre and wood.

Phosphorus. Oxygen and Hydrogen compounds of

Sept. 22, 1865.
Examining Boards.

139 Phosphorus. Theory of Acids. Monobasic, Bibasic, and EXAMINATIONS IN CONNEXION WITH THE Tribasic Acids.

DEPARTMENT OF SCIENCE AND ART, SOUTH Carbon. Carbonic Oxide and Carbonic Acid. The prin- KENSINGTON. cipal Hydrogen Compounds of Carbon. Manufacture of a sum of money is voted annually by Parliament for Coal-gas.

Silicon and Boron. Their compounds with the elements scientific instruction in the United Kingdom. previously enumerated.

This sum is administered by the Science and Art Metals. Characters of Metals as a Class. Metallurgical

Department. Processes. Alloys. Classification of the Metals.

The object of the grant is to promote instruction in Potassium. Nitre; Gunpowder. Theory of the action Science, especially among the industrial classes, by affordof Gunpowder.

ing a limited and partial aid or stimulus towards the foundSodium. Manufacture of Carbonate of Soda.

ing and maintenance of Science schools and classes. Barium. Strontium. Calcium. Mortars. Cements. The following are among the Sciences towards instrucMagnesium. Aluminium. Glass. Porcelain.

tion in which aid is given :- Acoustics, Light, Heat, Manganese. Iron. Composition and properties of cast Magnetism, and Electricity. Inorganic Chemistry. Organic iron, wrought iron, and steel. Chromium. Cobalt. Nickel. Chemistry. Geology. Mineralogy. Mining. Metallurgy. Zinc. Cadmium. Lead. Manufacture of white lead.

The assistance granted by the Science and Art DepartCopper. Mercury. Bismuth. Tin. Arsenic. Anti- ment is in the form of-1. Payments on results to certifi. mony. Silver. Gold. Platinum.

cated teachers. 2. Grants towards the purchase of appaPrincipal compounds of the metals with the Non-Metallic ratus, &c. 3. Public examinations, in which Queen's elements. Theory of salts.

Medals, Honorary Certificates, and Prizes are awarded, Principles of Mineral Analysis. Principles of Electro-Chemistry.

held at all places complying with certain conditions. On

the results of these examinations the payment on results Ia the Examination for Honours, the Candidate, not is made to the teachers. more than twenty-two years of age, who shall most distin- Examinations for Certificates to teach any of the beforeguish himself in Chemistry and Natural Philosophy shall mentioned Sciences are held annually, commencing in the receive an Exhibition of Forty pounds per annum for the first week in November, at South Kensington. Examinanext two years.

tions will also be held in Dublin and Edinburgh if five. SECOND EXAMINATION FOR B.SC. DEGREE.

candidates register themselves for examination in Ireland. This Examination embraces Organic Chemistry, includ examination by sending in his name to the Secretary of

and in Scotland. Any person whatever may attend this ing the following subjects :

the Science and Art Department before October 15, stating Ultimate analysis of Organic bodies. Calculation of the subject or subjects in which he wishes to be examined. empirical formule. Methods of controlling empirical for- Certificates of three grades are given in each group and mulæ. Determination of the equivalents of organic acids each subject. These certificates are only considered as and bases ; examination of products of decomposition ; simple records of the results of examination in the various determination of the vapour density of volatile bodies. sciences before mentioned, entitling the teacher to earn

Law of substitution. Compound radicals. Homologous payments by successful teaching in the subjects for which series.

he is certificated. The Chemical history of the Cyanogen group. Cyanogen.

The Science and Art Department holds, through the Hydrocyanic acid. Cyanic acid and Urea. Pulminates. agency of each Local Committee, in May of each year, a Cyanuric acid., Sulphocyanic acid. Chlorides of Cyano- public examination of all Science schools and classes in gen. Uric acid.

any locality throughout the United Kingdom which com. Amylaceous and saccharine substances. Fermentation. plies with the requisite conditions. On the results of this Alcohol, wine, beer, bread, &c.

examination the payments are made to certificated teachers. Homologues of Alcohol. Ethers, simple and mixed. Application for it must be made to the Secretary of the Oxidation of Alcohol. Aldehyde and Acetic acid and their Science and Art Department before the end of March in homologues. Anhydrides, simple and mixed. Compound each year, stating the number of persons and the subject ethers.

or subjects in which they are to be examined. All regis-, Diatomic Alcohols and their acids. Glycul and Oxalic tered students of Science classes under certificated teachers acid and their homologues.

(except Science certificated teachers) are eligible to receive Triatomic Alcohols. Glycerine. Fatty and oily bodies. Queen's prizes and Queen's medals' under the conditions Saponification.

hereafter mentioned. Vegetable acids. The principal.

The results of the May examination are classified under Ammonia and its derivatives. Ammonium and Ammo third class, (4) honourable mention, (s) pass, and (6) failed.

the following heads :-(1) first class, (2) second class, (3) niacal salts. Amides and Amines ; their classification. The names of the successful candidates, those under the The chief natural Organic Bases.

first five heads, are published. The standard of attainColouring matters. Indigo and its derivatives. Prin- ment required may be raised from year to year. For the ciples of Dyeing.

pass it is only such as will justify the examiner in reportThe chief constituents of the Vegetable organism. Cellu. ing that the instruction has been sound, and that the lose, Vegetable fibrin, Albumin, Časein, Glutin, &c. students have benefited by it. Those who have obtained

The chief constituents of the Animal organism. Animal a higher degree of proficiency are classed as honourable fibrin, Albumin, Casein, Gelatin. Blood, Milk, Bile, mention, or as 3rd, 2nd, or 1st class, according to their Urine, &c.

merit. Decay, putrefaction. Destructive distillation.

To the 1st class are given Queen's prizes, consisting of The Chemical principles of the process of Nutrition and books chosen by the candidates from lists furnished for of Respiration in Plants and Animals.

that purpose.

These prizes are unlimited in number,

except that a student who has once received a 1st class The Candidate, not more than twenty years of age, who, Queen's prize cannot receive a prize in the same subject in the Examination for Honours, shall most distinguish again. If such student should be again successful, his himself in Chemistry and Biology, will receive Fifty name will simply be recorded in the published list. To pounds per annum for the next two years, with the title of the 2nd and

3rd class certificates of merit recording the University Scholar.

result of the examination are given.


Chemical Lectures.


Sept. 22, 1865.

The Queen's medals are, one gold in each group, one Metallurgy.- Professor : Dr. Percy, F.R.S.. silver and two bronze in each subject, for competition The course of instruction in Metallurgy consists of throughout the United Kingdom. Only registered students Lectures and Laboratory practice. of schools and classes under local committees can obtain In the Lectures the processes of extracting metals from medals. They cannot be taken by middle class students their ores are fully described, the chemical principles who are more than 17 years of age.

which they involve are explained, a detailed description The payments to the certificated teacher are as follows: is given of the furnaces and machinery employed, and, as -He receives il, for every student of the industrial classes far as reliable information can be obtained, the cost of prowho has received forty lessons from him in a subject in duction is stated. The illustrations consist of a very which he is certificated, and passes in such subject of extensive series of specimens, diagrams, and models. scientific instruction ; 21. for every one who is honourably Experimental demonstrations are occasionally introduced, mentioned ; 3., 4., or gl. for every one who takes a 3rd, but the time required for the satisfactory illustration by 2nd, or ist class. These students must have received experiment of the chemical phenomena which occur in forty lessons at least from the teacher since the last exami- metallurgical processes is generally so long as to make it nation at which payment was claimed on their account. impossible that in this respect the Lecturer of Metallurgy The forty lessons need not necessarily be all given in one should follow the example of the Lecturer on Chemistry. year, but may extend over a longer period. gl. is the In the Metallurgical Laboratory the students have the maximum that can ever be claimed on account of the opportunity of conducting all necessary experimental instruction of any one pupil in a subject.

investigations. A grant towards the purchase of apparatus, diagrams, Metallurgical Laboratory.—This Laboratory is conducted &c., of 50 per cent. on the cost of them, is made to Science by Mr. R. Smith, under the direction of Dr. Percy, and schools and classes in Mechanics' and similar institutions is devoted to practical instruction in Metallurgy, The where the teacher is certificated, and to the extent of sl. instruction comprises assaying in all its branches, especially to other poor schools and classes.

of the more important metals, such as iron, copper, lead, The travelling expenses (second class railway fare and tin, alloys of silver and gold, &c., and the examination of 108. per diem personal allowance) of a candidate in attend. ores and metallurgical products. ing the November examination are paid if he be successful There are three terms in the collegiate year, of three in taking a certificate or in improving the grade of one he months each. The Laboratory hours are from 10 to 4 has already taken.

during November, December, January, and February ; and from 10 to į during the other months, with the

exception of Saturdays, when the Laboratory is closed. CHEMICAL LECTURES.

The charge for instruction in the Metallurgical Labora.

tory is 156. for three months, 121. for two months, and 71. ROYAL SCHOOL OF MINES AND COLLEGE OF

for one month.

Lectures to Working Men.-Short Courses of Lectures CHEMISTRY.

at suitable periods of the year are given in the evening to Chemistry.-Professor E. Frankland, F.R.S., P.D. Working Men. These courses are systematic, and arranged The instruction in Chemical Science embraces

so as illustrate, within the period of two years, the prin1. A Course of Lectures on Experimental Chemistry, cipal subjects taught at the Institution. Those for the with special reference to the applications of Chemistry in ensuing Session include Chemistry, Metallurgy, Physics. the Arts and Manufactures. 2. A systematic Laboratory Course for the Practice of

UNIVERSITY COLLEGE. Chemical Analysis.

Chemistry.-Professor Williamson, Ph.D., F.R.S. The Lectures are delivered in the Theatre of the Royal Daily, except Saturday, from 11 to 12. College of Chemistry, Oxford Street.

Payment to the College, for a Half Term, zl.; for the Chemical Laboratory. The general Laboratory for in- Term, 61. ; Perpetual, 97. struction in chemical manipulation, in qualitative and The properties of the more important elements, and the quantitative analysis, and in the method of performing methods of detecting and separating them, will be exchemical researches, is under the direction of Dr. Frank- plained. land. The Royal College of Chemistry having become Processes for preparing chemical compounds useful in the property of the Government, its spacious and well. Medicine or the manufacturing Arts will be examined in furnished Laboratories are used for the instruction of the connexion with the principles upon which they depend. pupils of the Royal School of Mines.

The construction and use of apparatus for experimental There are three terms in the collegiate year, of three purposes will be shown. months each. The Laboratory hours are from 10 a.m. to · The Subjects of the Course will be considered in the 5 p.m., with the exception of Saturdays, when the Labor. following order :atory closes at 2 o'clock.

Changes in the condition of matter by the action of heat. Each Laboratory student works independently, there Light in its bearings upon chemical action, and in its being no classes. All operations are superintended by the application to analysis. Professor and his Assistants. A table with drawers, cup. Electricity as an agent of decomposition and change. boards, and shelves, is appropriated to every pupil. The The atmosphere in its chemical and physical properties, Institution supplies gas, fuel, and reagents. The larger and its functions in supporting vegetable and animal life. and more expensive instruments of the Laboratory, such Explanation of the processes of eudiometric analysis, and as air pumps, thermometers, barometers, condensers, &c., demonstration of the regularity of combining volumes of may be used by the students, who are held responsible for gases. their safety. The students have to provide themselves The non-metallic elements, such as sulphur, iodine, &c., only with the apparatus specified in the Laboratory regu- and the simplest of their compounds, as sulphuric acid, lations. More advanced students engaged in private re- nitric acid, ammonia, &c. searches have to supply themselves with such materials as The metals, and the most useful or remarkable of their are not included amongst the ordinary reagents of the compounds, in connexion with the laws of combination ; Laboratory.

also the constitution of salts, the atomic theory, &c, The The charge for instruction in the Chemical Laboratory tests for poisons will be explained and shown. is 12t: for three months, gl, for two months, and sl. for About thirty to forty Lectures will be devoted to one month.

Organic Chemistry, including the characteristic properties

speca, Moro Chemical Lectures-Lectures at London Medical Schools.



and metamorphoses of the chief groups of organic com- Examinations of the Class, both viva voce and by pounds, whether of animal or vegetable origin, such as the written papers, are held at intervals during the course of alcohols, fatty acids, alkaloids, acids of the bile, albu- the usual Lecture hour. Dr. Miller has published a work minous substances, &c.

on Chemistry, which is used as a text-book by the Class. Practical Chemistry.- Professor Williamson, Ph.D., Third Year.-Students who have completed six Terms F.R.S.

in this department are admitted to a Course of “Practical The Professor is aided in the direction of the Students Chemistry," consisting of twelve Demonstrations in each by Assistants.

term; and they go through a course of Manipulation in INSTRUCTION IN ANALYTICAL CHEMISTRY.

the most important operations of Chemistry, including the Birkbeck Laboratory.

first steps of Analysis. The Course of Instruction in this department is intended

Any Student of this department may be admitted to for the assistance of Senior Students in the pursuit of all this Class at any period of his study on payment of an branches of Chemical Investigation, more especially extra fee. Organic Research, and for the instruction of less advanced

Experimental and Analytical Chemistry in the Laboratory. pupils in Elementary Analysis. It qualifies the Studeni --The object of this Class is to afford to Students who are for the application of Chemical Science to Agriculture, desirous of acquiring a knowledge of analysis, or of proMedicine, and the Mechanical Arts; and arrangements secuting original research, an opportunity of doing so have been made for giving practical instruction in Gas under the superintendence of the Professor and DemonAnalysis. The Laboratory and offices are fitted up com

strator; Students may enter, upon payment of the extra pletely with the most approved apparatus and utensils for fees, at any time except during the vacation, and for a period experimental research, both for beginners and advanced of one, three, six, or nine months, as may best suit their Students. They are open daily from 9 a.m. to 4 p.m. from convenience. The Laboratory hours are from ten till four October 3 until the end of July, with a short recess at daily, except Saturday, on which day the hours are from Christmas and Easter.

ten till one. Fee for the Session, 261. 58. ; six months, 181. 188.;

In addition to the Laboratory Fee, each Student defrays three months, vol. 10$. ; one month, 41. 48., exelusive of the expenses of his own experiments. The amount of this the expense of materials. A deduction of 40 per cent. is expense, which is comparatively trifling, is entirely under made for Students who can attend only three fixed days

his own control, per week.

The Gold Medal as a reward of merit for this Class will Classes for Evening Instruction are held at King's Col. be given by the Council as usual.

lege from October to March, and during April, May, and

Summer Course.--A Course of Fifty Lessons, of one

The Classes include one for the Elements of Chemistry

and one for Practical Chemistry. hour each, on Mondays, Tuesdays, Wednesdays, Thurs

The fee for the former is il. 118. 6d. ; for the latter days, and Fridays, from 11 to 12, commencing the first 21, 28. The Classes meet twice a-week. week in May, Fee 4.. This payment includes the cost of materials, &c.

MINERALOGY. Elementary Chemistry--Theoretical and Practical.

Professor.- James Tennant, Esq., F.G.S.

The Course commences with a description of the PhysiBirkbeck Course. Professor Williamson, F.R.S., and Dr. Russell.

cal and Chemical characters of Minerals in general. The A Course of Fifteen Lessons, of two hours each, on and the readiest mode of distinguishing them described.

principal simple Minerals are next separately considered, Tuesday and Friday, from the beginning of May to the end of June. Hours, from 7 to 9 p.m. Fee, including of all the substances entering into the composition of

The course of instruction includes a minute description the cost of materials, &c.,


, for Masters of Unendowed Rocks, and of those minerals which are also used in the Schools and Ushers, and for persons engaged in Manufac-Arts ; 'illustrated by an extensive collection of charactures or like pursuits. The elements of Chemistry are explained to the Class, ) teristic specimens, and diagrams of the principal crystal

line forms, &c. and the experiments illustrating the subject performed by the Students.

. The first part of the Course is devoted to the study of non-metallic elements and compounds, their properties,

LECTURES AT LONDON MEDICAL and the best methods of distinguishing and separating

SCHOOLS. them. In the second part the most important properties of the metals are studied. The ordinary methods of inorganic analysis are especially dwelt on, and solutions

ST. BARTHOLOMEW'S HOSPITAL AND frequently given to the Class for analysis.

All the experiments and analyses are repeated by each
Student, or by not more than two Students jointly.

Lecturer.-Dr. Odling, Monday and Friday, at half

past ten, and Wednesday, at ten. One course, sh. 58. KING'S COLLEGE. Professor of Chemistry.-W. A. Miller, M.D., F.R.S.

Practical Chemistry.-Dr. Odling, Monday, Tuesday, Professor of Practical Chemistry.-C. L. Bloxam, Esq. Thursday, and Friday, from eleven to one. One course, Demonstrator.--E. A. Hadow, Esq.

21. 28. The course commences with a view of the Forces which concur to the production of Chemical Phenomena, after CHARING-CROSS HOSPITAL AND COLLEGE. which the laws of Chemical Attraction are discussed, and the Non-metallic Elements and their principal Compounds are described.

Lecturer.- Mr. C. W. Heaton. Tuesday, Thursday, and The metals and their principal compounds are next

Saturday at ten. One session, 5l. 58. examined, care bein taken to point out the applications

The Laboratory is open daily from ten to four p.m. of the Science to the Arts, and the processes of the different Manufactures, of Metallurgy, and of Domestic Practical Chemistry.-Mr. Heaton. Monday, Wednes. Economy, are explained and illustrated.

day, and Friday. One session, 26. 28.





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