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The Institute of Chemistry.

some dye which is not in the market at all, or which, if known, could not by any means produce the colour in question. The celebrated shoe-maker of Stettin, whose inflamed eyes were first ascribed to an arsenical hat-lining, but were afterwards traced to a diligent internal use of potato-whiskey is a case in point. We have no objection to Mr. Carr collecting instances of poisoning from dyes, but they should be such as will bear cross-examination. As far as arsenic is concerned we must bear in mind that there are many channels other than dyes and pigments through which it may be introduced into the human system. If we remember the violet powder case we may well suspect that arsenic is one ingredient of the cosmetic powders which so many ladies apply to their hands and faces.

As regards the aniline colours their physiological action is still a matter of doubt. That aniline itself is poisonous is far from being a proof against its derivatives. Much research will therefore be needed before either physicians or chemists can form a decided opinion on the safety of any given dye or pigment, and such research, thanks to the Vivisection Act, has been rendered in England all but impossible. Meantime we should do nothing rashly. If we burden our colour makers, dyers, and printers with regulations from which their competitors in France, Germany, &c., are free, we shall merely strike a heavy blow at our national industry. In none of those countries is there any restriction on the use of nonarsenical coal-tar colours in textile manufactures.

The British Journal Photographic Almanac and Photo-
grapher's Daily Companion for 1879. Edited by J.
TRAILL TAYLOR. Henry Greenwood.
THE twenty-fifth issue of this well-known year-book gives
a vivid idea of the immense progress which photography
has made in this country since first it put forth its few
modest leaves. Besides the usual information contained
in almanacs we have 200 pages containing succinct
accounts of every photographic process and discovery
belonging to the past year, condensed from an immense
number of scientific Transactions and journals from all
parts of the world, prefaced by a summary of the progress
made in photography during the past year. Mr. Taylor
se edes from the editorship of the Almanac this year.
May we suggest to his successor the advisability of classi-
fying the information given in the body of the work under
distinct headings instead of allowing it to be mixed up in
picturesque disorder as at present. There is a copious
index appended to the book. As an instance of the
enterprise of photographic material dealers we may men-
tion that the almanac contains nearly one hundred and
fifty octavo pages of advertisements.

The Patentees' Manual: being a Treatise on the Law and Practice of Letters Patent, especially intended for the Use of Patentees and Inventors. By JAMES JOHNSON, Barrister-at-Law, and J. HENRY JOHNSON, A.I.C.E. Solicitor. Fourth Edition. Longmans and Co. 1879. THIS is the fourth edition of Messrs. Johnson's standard work, and is a great advance on the preceding ones. The whole text has been thoroughly revised, and several of the chapters greatly enlarged or re-written. A new chapter on Oppositions to the Grant of Patents has been added, and the latest decisions of the Courts incorporated with the text. The new German and Spanish Patent Laws have been given, and the Appendix contains an account of those of our Colonies, as well as a reprint of all the Acts of Parliament bearing on the subject, with references to typical cases decided thereon. Messrs. Johnson may be congratulated on the successful way in which they have respectively completed their arduous task. Their work is another instance of the truth of Adam Smith's grand theory of the division of labour. There is a copious index

at the end.

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CORRESPONDENCE.

TENACITY OF STARCH.

To the Editor of the Chemical News. SIR,-I have read with interest the method employed by Mr. George Whewell for determining the tenacity of starch, but think it right to call attention to the last paragraph of his paper, which gives the conclusions he draws from his experiments; these in my opinion are entirely erroneous. He says in effect, If the paste given by one sample of starch is firmer or has more "tenacity" than that given by another, the former will give more stiffness to the cloth into which it is introduced in direct proportion to the resistance which it offers to a weight placed on its surface. If this be so, then supposing we take calcined farina (British gum), and dissolve it by boiling in the smallest proportion of water possible; it would make a syrup which would not support any weight placed on its surface, and consequently, according to Mr. Whewell's theory, would not give any stiffness to cloth when used in sizing. And yet it is undoubtedly the case that if we make solutions by boiling equal weights of British gum and farina with equal weights of water, and pass threads or cloth through each, and then dry them, the former solution will give more stiffness to the threads or cloth than the latter, and weight for weight the farina which possesses the least "tenacity" would produce the greatest stiffness, because the thinner the sample boils the inore easily will the solid matter be able to enter the fibre, and it will enter in greater quantity. I know that the opinion expressed by Mr. Whewell is held by many manufacturers, but it is fallacious.-I am, &c., WILLIAM THOMSON.

Royal Institution, Manchester.

CHLORIDE OF CALCIUM.

To the Editor of the Chemical News. SIR,-In the CHEMICAL NEWS, vol. xxxix., p. 97, Mr. O. Gluge, of Sarrebruk, in a "Note upon Chloride of Cal. cium," refers to its manufacture as a by-product in the manufacture of alkali by the Solvay process; but he does not seem to be aware that it is also a by-product in the manufacture of bicarbonate of soda by the Leblanc prohave made chloride of calcium for sale by one or both of cess and of bleaching-powder by the Weldon process. We considerable portion of which time our sales have exceeded these processes for upwards of fifteen years, during a thirty tons weekly. If Mr. Gluge will refer to the back numbers of the CHEMICAL NEWS he will find that for

many years our product was advertised in your pages.— GASKELL, DEACON, AND CO.

We are, &c.,

THE INSTITUTE OF CHEMISTRY.

To the Editor of the Chemical News. SIR,-The letter of Mr. Charles E. Groves, written in answer to mine signed "A Disgusted Promoter," com. mences by accusing me of inaccuracy, the only instance adduced being that I referred to the recent conference as one on the "Adulteration of Food and Drugs" instead of the "Adulteration of Articles of Food." It is true that Mr. Groves also points out that when my letter appeared the conference which I spoke of as pending had already taken place, but you, Sir, if my original MS. is still extant, will know that my letter was written and received by you a few days before the date fixed for the second conference. There is another error in my letter which I will give Mr. Groves the benefit of. I spoke of the conference on trade

NEWS

certificates being held in December, whereas the true date of the meeting was November 22.

on M. Planté's system, which may be easily charged by means of two nitric acid elements, can give effects of Although it was true when I wrote my last letter that tension equal to those of 1200 nitric acid elements. no report of the November conference had been pub. These currents are of course temporary, and the apparatus rished, the statement is no longer correct, for since my serves a kind of condenser of voltaic currents, but they letter appeared in your pages the members have received a are sufficiently permanent to produce mechanical, thermic, printed report of the proceedings. Will Mr. Groves excuse and luminous effects of great power. the suggestion that its circulation is a consequence of my criticisms? Whatever may be the cause, it is satisfactory to find that the Council have published the report, though it has taken them nearly four months to do it.

I may remind your readers that I did not, as stated by Mr. Groves, "recommend Fellows not to pay their subscriptions," but merely suggested that they should defer doing so until the Council proposed to spend the large sum of money already in hand. Mr. Groves will best serve the Institute by publishing a candid statement of the plans of the Council. To gain this was the object of my last letter, but Mr. Groves wholly ignores my challenge, in his reply, though from the fact that the Report of the Council has just been circulated amongst the Members I

conclude that he is alive to the nature of it.

My letter having secured the chief results aimed at, I beg to subscribe myself

March 15, 1879.

AN APPEASED PROMOTER.

VICTOR MEYER'S NEW METHOD OF VAPOUR.
DENSITY DETERMINATION.

To the Editor of the Chemical News. SIR, Referring to the interesting note by Greville Williams, F.R.S., in the CHEMICAL NEWS (vol. xxxix., P. 110), I see he mentions having abolished the funnel, d, figuring in the woodcut (page 66). Now this funnel-like aperture is somewhat exaggerated in the printing, and in reality the opening or widening is very little larger than the main stem of the instrument, and just conveniently sufficient to admit a small india-rubber stopper, which V. Meyer always uses. The advantage of the transparent glass vessel or bath, c, is that the ascent of the heated vapours can easily be seen on boiling the liquid-the bulb and so the operation is more conveniently regulated. I may also mention that Prof. Victor Meyer has not only had the instrument made of porcelain (better for several reasons than metal), but has made and is making by means of this instrument (identical in every other respect with the glass one) a number of interesting determinations of the vapour-densities of certain extremely high boiling inorganic substances, leading to still more interesting theoretical WATSON SMITH, F.C.S., F.I.C.

conclusions.-I am, &c., Zürich, March 17, 1879.

CHEMICAL NOTICES FROM FOREIGN
SOURCES.

NOTE.-All degrees of temperature are Centigrade,unless otherwis expressed.

Comptes Rendus Hebdomadaires des Séances, l'Académie de des Sciences. No. 8, February 24, 1879. Induced Currents Resulting from the Movements of a Coil across an Electro-Magnetic System.-M. Th. du Moncel.-The induction currents in action in the Gramme machine consist of those which result from the movement of the covered spirals before the inducer and of those determined by the inversions of the polarity of the iron ring.

Observations with Reference to M. G. Planté's Recent Work "Researches on Electricity."- E. Becquerel.-A secondary battery of 800 elements arranged

Hemihedral Forms of Alums.-Lecoq de Boisbaudran.-The author presented to the Academy a crystal of alum having four smooth and four rugged surfaces, arranged so as to represent the union of two inverse tetrahedra. It was obtained by steeping an octahedron of chromo-potassic alum for some hours in a slightly supersaturated solution of basic ammonia-alum. Surfaces in Presence of their Mother-liquor.-Lecoq Resistance to a Change of Condition of Crystalline de Boisbaudran. The action of different isomorphous crystals upon the solution of any one of them is not the same. The transition from the state of the very slow dissolution of a crystalline surface to its very slow increase is not effected abruptly in consequence of an extremely slight change in the concentration of the liquid, but each surface remains intact without either gaining or losing substance in a mother-liquor, the strength of which ranges within certain limits, which, though narrow, are easily perceived. The resistance to a change of state is modified for each system of surfaces independently, in such a manner that an alteration in external conditions (a change in the composition or in the temperature of the liquid, &c.) involves generally a change in the relation of the resistances of the two given systems of surfaces. Contrary to the opinion of some authorities, there does not exist a state of mobile equilibrium between a crystalline surface and its mother-liquor; there is no continual interchange of molecules, but merely a continual erosion or a continual deposition, and within the limits of resistance to change of condition there is neither erosion nor deposition.

Reflections on the Communication made by M. de Lesseps Concerning the Contagion of the Plague.— M. Bouillaud.-The author considers that the researches of M. Pasteur on the low organisms considered as propagators of disease must greatly modify our views on the spread of epidemics.

Projection of Molecular Shadows.-W. Crookes.

Action of Variously Coloured Light upon a Layer of Silver Bromide Saturated with Various Organic with an extract of mallows the direct spectrum of the Colouring Matters.-Ch. Cros.-Upon plates sensitised Drummond light is inactive in the medium green, but very

active at the red and the violet extremities. With carthamin the mean portion is most active, and with chlorophyll the action extends throughout the visible spectrum, and even somewhat beyond. It presents several distinc

maxima and minima.

I

The Production of Crystalline Barium Chromate. -L. Bourgeois, -The author heats to bright redness for half an hour 2 equivs. barium chloride with 1 equiv. potas. sium chromate and I equiv. sodium chromate; lets the mass cool slowly, when crystals of a pistachio-green are found in its interior. They are freed from the alkaline chlorides by washing with boiling water. The specific gravity is 4'60. They dissolve readily in dilute hydrochloric or nitric acid, giving an orange liquid. They are decomposed by sulphuric acid with formation of barium sulphate and chromic acid. They consist of 60'4 per cent of baryta, and 39.6 of chromic acid, corresponding to the formula BaO,CrO3. The green colour is not due to the presence of chromic oxide.

Composition of Beer-yeast.-P. Schützenberger and A. Destrem. The authors consider yeast as containing complex compounds, at once hydrocarbonic and proteic, formed like glucosides, and easily decomposed by acids and alkalies. The exterior of the granules differs from

124

Chemical Notices from Foreign Sources.

{CHERICAL NEWS,

March 21, 1879.

the interior merely by containing more hydrocarbonic light can readily be distinguished from other melted fats, as the latter display a crystalline structure.

matter.

Pyrogenous Carbides of American Petroleum.-L. Prunier. The author has discovered a compound of the composition (C12H2)n, and containing 97 29 of carbon. These figures indicate the existence of a new group of incomplete carbides higher than any previously known, since benzerythren, parachrysen, fluoranthren, and pyren do not contain more than 95 per cent of carbon.

On Glycide.-M. Hanriot.-Glycide represents the alcohol corresponding to epichlorhydrin.

Production of Aniline-black by Means of the Chromates in Presence of Chlorates.-S. Grawitz. The author denies the accuracy of the conclusions of M. Witz on the inutility of chromates.

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Chemiker Zeitung.

No. 1, 1879. Preparation of Zinc from Blende.-The blende is partly roasted and is then treated in a muffle with burnt lime and coke. Calcium sulphide is formed and the greater part of the zinc present in the ore is volatilised. This is condensed or collected as zinc oxide as in the ordinary zinc furnaces. From the calcium sulphide sulphuretted hydrogen is evolved, and by its action upon the sulphurous acid gas given off on roasting the blende sulphur is obtained.

Process for Obtaining Tanning Agents along with Cellulose, Gum, and Acetic Acid from Vegetable Matter.-Dr. A. Mitscherlich.-Wood or other vegetable matter is treated at an elevated temperature with bisulphite of lime (under pressure ?). The cellulose which is cemented together by other compounds is set at liberty in the same state in which it exists in plants. It is readily freed by washing from the accompanying substances, and can be at once utilised for paper-making, &c. The soluble substances vary according to the material employed, and embrace compounds suitable for tanning and for the manufactures of gum, acetic acid, and alcohol. The methods for separating these substances are omitted. Dr. H. Buff, Professor of Physics at the University of

Giessen, died on December 24, 1878.

Sawyer and Man's electric lamp has been tried in New York with great success. The light is produced in an atmosphere of nitrogen so that there can be no combustion and no generation of nitrogen oxides an objection lately raised against the electric light. The cost for equal illumination is said to be only one-fortieth that of gas, and the light can be regulated from a faint gleam up to the intensity of 30 gas-jets.

Analysis of Butter.-E. Mylius finds that butter globules if examined with the microscope by polarised

Quality of Milk.-According to the researches of Berguerel, Vernois, and Müller the respective proportions of the constituents of milk are affected not by race but by age, diet, and other causes not yet ascertained. No. 2, January 9, 1879.

Quantitative Spectrum Analysis.-Wolff proposes the following methods for the determination of cobalt, copper, and metallic iron. 1. Determination of very small quantities of cobalt.-A solution of cobalt-sulphocyanide, obtained by mixing a very dilute alcoholic solution of chloride of cobalt or cobaltous nitrate with an excess of alcoholic ammonium sulphocyanide, displays in the region C39D-C55D a very characteristic absorption spectrum. By means of a solution of cobalt sulphocyanide of known strength he determines the residual strength of light in a stratum of 1 centimetre in thickness, the coefficient of extinction and consequently the absorp tive proportion for cobalt. The latter number is multiplied by the volume and the coefficient of extinction of the solution under examination, and gives the weight of the cobalt present. It must be remarked that in these experiments alcohol of the exact specific gravity 0-833 must be used, because an alcoholic solution of cobalt sulphocyanide differs in the intensity of its blue colour according to the strength of the alcohol. This behaviour has been utilised by Morrel for a colorimetric determination of alcohol. 2. Determination of Copper.-The absorptive proportion for copper sulphate or for metallic copper is measured as ammonio-sulphate of copper. To determine small quantities of copper in articles of food, &c., the ash is dissolved in an acid, the dissolved copper is separated electrolytically, re-dissolved in nitric acid, and saturated with ammonia to a certain volume. The latter multiplied by the coefficient of extinction of the solution obtained and with the absorptive proportion of metallic copper as previously ascertained, shows the weight of the copper present in solution. 3. Determination of Metallic Iron.The ferriferous substance is mixed with a normal cupric solution, whose volume, coefficient of extinction, and equivalent in iron are known. The solution filtered from the deposit of copper is evaporated, oxidised, supersaturated with ammonia, separated by filtration from ferric oxide, and made up to a fixed volume. The coefficient of extinction and the equivalent in iron of this solution are ascertained; the latter subtracted from the known iron equivalent of the normal copper solution originally employed shows the metallic iron.-Zeitschrift Anal. Chem., 18, 38.

Simplified Butter Test on Hehner's Principle.Reichert saponifies a known quantity of butter, dissolves the soap in water, adds sulphuric acid, and distils. If the butter is pure 2 grms. of the sample yield a distillate which requires at least 13 c.c. of decinormal soda.

MISCELLANEOUS.

Professor Church and the Agricultural College.At a meeting of the Committee of Management of the Agricultural College, held last week in London, present Earl Bathurst, the Earl of Ducie, Col. Kingscote, C.B., M.P., Mr. G. Sotheron Estcourt, M.P., Mr. A. L. Goddard, M.P., Mr. T. S.Bazley, and Mr. Edward Bowly, the following resolution was passed, in reference to Prof. Church's application for permission to reside out of the College:"The Committee of Management are of opinion that the discipline of the Agricultural College cannot be satisfactorily maintained except by the residence of professors within the College walls in conformity with the original byelaw No. 47. Being fully sensible of the services rendered by Prof. Church during his 16 years' residence in the

College, they the more regret that they cannot accede to his recent proposal of non-residence, a compliance with it involving such alterations as would unduly disturb the present organisation of the College staff." We under

The Prestolee Alkali Works, Farnworth, near Bolton, Lancashire, fitted with costly Plant, Machinery, and Apparatus for the Manufacture of Soda-ash, Bleaching-powder and Liquor, and Sulphuric Acid, in complete working order, with possession.-Preliminary.

stand that, in consequence of the above decision as to Prof. MESSRS. FULLER, HORSEY, SONS, Church's connection with the Agricultural College, the two resident professors next to him in seniority have resigned their respective chairs; the chair of mathematics and physics being vacated by Prof. H. W. Lloyd Tanner, M.A., that of natural history by Prof. Fream, B.Sc., F.G.S. Science in the Streets.-Under the title of the "New Parisian Electric Pipe-lights" a number of itinerant vendors are selling in the streets of the metropolis small brass boxes containing three or four rodlets of metallic sodium, an inch long and one-tenth of an inch square. The method of using these lights, which are sold at a penny a box, is simple. A morsel of the metal is pinched off and placed on a piece of paper which has first been moistened with water or saliva. The sodium of course

inflames and sets alight to the paper. The risk to person and property that will be caused by the indiscriminate distribution of such a very dangerous material as metallic sodium, which even skilled chemists are obliged to handle with the greatest care, is obvious to all who know its properties. We have on a former occasion called attention to the evil of allowing the open sale of metallic sodium in toy shops under the name of "Satan's Tears," and we believe a stop was put to it by the police. In the present instance the danger is much greater, inasmuch as any urchin who has a penny to spare has it in his power to set half a street in flames at a moment's notice.

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and CO. are instructed to SELL by AUCTION, at the Palatine Hotel, Manchester, on Thursday, April 17, at 3 o'clock precisely, in one lot, unless an acceptable offer be previously made by private contract, the PRESTOLEE ALKALI WORKS, a freehold property, having a superficial area of 95,741 square yards of land, subject to chief rents amounting to £407 138. 9d. per annum, with the buildings, plant, machinery, and apparatus erected thereon, capable of manufac turing monthly a product exceeding in the aggregate 2000 tons of soda-ash, bleaching-powder and liquor (by Weldon's patent process), and sulphuric acid, also caustic soda and muriatic acid. The amount expended in the construction of these works has been very large. A valuation was made with great care in 1874 by Messrs. Holmes and Son, the well-known valuers, of Manchester; their estimate then amounted to £99,900, and since that time a sum exceeding £10,000 has been expended. The whole of the works and plant have been well kept, and are conveniently arranged for working. The Bury, Bolton, and Manchester Canal, which forms one boundary of the property, affords facility for economical water carriage, and the Lancashire and Yorkshire Railway is within a very short distance. There is a plentiful supply of water for all manufacturing purposes, free of cost, from the river Croal, and coals are raised from pits in the immediate neighbourhood. Pyrites, salt, lime, and limestone are all brought by boats direct to the wharf on the canal. The works may be economically worked with a small capital, as arrangements may be made with the vendors for a very considerable portion of the purchase money to remain upon mortgage. Large profits have been realised in the past, and the high reputation of the Prestolee manufactures in the market will ensure to an energetic nan, even at the existing low prices, an ample return for his capital invested and possession of works not surpassed for completeness or compactness by any in the kingdom. Printed particulars are in course of preparation, and may shortly be had at the Works; at the Palatine and Queens Hotels, Manchester; of Messrs. Wakeman and Bleeck, Solicitors, Warminster; and of Messrs. Fuller, Horsey, Sons, and Co., 11, Billiter Square, London, who are empowered to treat for the disposal by private contract.

Prestolee Alkali Works, Farnworth, near Manchester and Bolton.Useful Horses, rolling stock, loose effects, and remaining stock-intrade.

MESSRS. FULLER, HORSEY, SONS,

and CO. are instructed to SELL by AUCTION, on the PREMISES, Farnworth, near Manchester, on THURSDAY, April 3, at twelve precisely, the ROLLING STOCK, loose materials, and stock-in-trade, including 16 powerful cart horses, four wrought-iron tank trollies, nine lorries, II spring tip and float carts, harness, two cast-iron caustic pots, cast-iron decomposing pot, double-flue Lancashire boiler 7 ft. diameter, 19 ft. 6 long, about 30 tons useful wrought- and cast-iron material, one ton lead, brass cocks and taps, slate slabs, York stone foundations, new wire netting, useful ash timber spokes and felloes, four canal boats, earthenware aqua fortis jars and packing boxes; also 25 tons soda-ash, 72 carboys rectified oil of vitriol, 300 empty carboys and stock of bleaching liquor and powder in process of manufacture, and numerons other effects.-May be viewed the day preceding the sale, and catalogues had on the premises, of Messrs. Wakeman and Bleeck, Solicitors, Warminster; and of Messrs. Fuller, Horsey, Sons, and Co, 11, Billiter Square, London, E.C., or will be forwarded on application.

BERNERS COLLEGE of CHEMISTRY.

Instruction and preparation in CHEMISTRY and the EXPERIMENTAL SCIENCES under the direction of Professor E. V. GARDNER, F.A.S., M.S.A.

The Class Rooms are open from 11 to 5 a.m. and from 7 to 10 p.m daily.

Especial facilities for persons preparin for Government and other examinations.

Private Pupils will find every convenience.

Analyses, Assays, and Practica Investigations connected with Patents, &c., conducted.

Prospectuses and full particulars on application to Prof Gardner
at Berners College, 44. Berners-street, W.

WILLIAM AND WILLIAM T. FIELD,
ΜΑ

ANUFACTURERS

of the Celebrated STAFFORDSHIRE BLUE BRICKS, specially adapted for Chemical Plant, i.e., Acid Towers, &c. Aiso all other kinds of Best Staffordshire Blue Bricks, Pavings, Plynths, Splays, Copings, &c. &c. Prices and samples on Application.

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V. Some New Optical Illusions. By Silvanus P. Thompson,
BA., D.Sc., F.R.A.S.

VI. On Electrical Insulation in High Vacua. By William
Crookes, F.R.S.

VII. Spider's Web for Micrometers.

VIII. The "Jumpers," or "Jumping Frenchmen."
Correspondence-The Character of the Sexes.-Transformation o
Species.

Reviews of Scientific Works-Science Notes-Proceedings of
Scientific Societies.

London: 3, Horse-Shoe Court, Ludgate Hill.

JUST PUBLISHED, 4th EDITION.
10s. 6d. cloth, Demy 8vo., pp. 420,
THE

The

CHEMICAL NEWS,
March 21, 1879.

Advertiser, who has had many years'

practical experience in experimental and analytical chemistry, is desirous of an Appointment, either in England or Colonies, as Chemist or Assistant.-Address, A. B. C., CHEMICAL NEWS Office, Boy Court, Ludgate Hill, London, E.C.

he Advertiser, a German, desires an appoint

The

ment in the Laboratory of a Chemical Works; he has passed the German Chemical Examinations; has had good experience in Industrial and Analytical Chemistry both in Sweden and Germany, and is now engaged with a London Firm. First-class references given. -Address, P. T., care of Schacht and Co., 6, Finsbury Place South.

Situation wanted by an Analytical Chemist

acquainted with food and general analysis. Has studied in_a German Laboratory and is accustomed to teaching.-Address, D, CHEMICAL NEWS Office, Boy Court, Ludgate Hill, London, E.C.

Wanted, by an experienced man, a Situation

as Manager or Sub-manager in Tar or Amm nia Distillery; thoroughly understands Sulphate of Ammonia making, and the producing, separating, and analysing of all Tar Products -Address, 200, CHEMICAL NEWS Office, Boy Court, Ludgate Hill, London, E.C. TO SULPHURIC ACID AND CHEMICAL MANURE MANUFACTURERS.

A Sailing Tank Barge to be Sold. Capable of

carrying 50 tons of acid; fitted with steam pumps; in good condition.-May be seen at Messrs. B. Jacob and Sons' Wharf, Copperas Lan-, Church Street, Deptford, from whom all particulars can be obtained.

FOR

TO MANURE MANUFACTURERS.

OR SALE.-About 100 tons Monthly Spent Animal Charcoal on a basis of 70 Phosphate.-Address, John Schwartz, Sugar Refinery, Pelham Street, E.

PATENTEES' MANUAL. YOUNG'S PARAFFIN LIGHT & MINERAL OIL CO.,

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Of the Middle Temple, Barrister-at-Law, and

J. HENRY JOHNSON,

Solicitor and Patent Agent, Assoc. Inst. C.E. 47, Lincoln's
Inn Fields, W.C., and Glasgow.

This Edition, much enlarged, gives a practical reference to every reported case of importance, and contains all the information on the law and practice of Patents Inventors and Patentees can require.

The Appendix contains the Statutes and Rules, and a summary of the Laws of all Foreign States and British Colonies.

London: LONGMANS and CO.

Have a Pure Body and Good Health by taking
DR. EVANS'S

PURE VEGETABLE CARBON,

NATURE'S GREAT BLOOD PURIFIER. Perfectly tasteless, void of smell. and can be taken by the most delicate.

This new and wonderful cure for Indigestion, Wind, Foul Breath,
Headache, Bile, Acidity, Incipient Consumption, Eruptions of the
Skin, and all disorders that can emanate from Impure Blood.

Sold by Chemists in 2s. 6d. and ros. cases; or post free of
JAMES GOODFELLOW and Co.,

46 and 48, CITY ROAD, LONDON.

TO BE LET, at best offer obtainable, Com

plete Copper Extracting Works and Complete Phosphorus Works; Acid Chambers adjoining.-Address in first instance, G. J Blower, 38, Lowe Street, Whitmore Reans, Wolverhampton.

MAGENTA RESIDUE, and free from Lime.

An immediate purchaser may meet with a quantity cheap by Addressing Cerise, CHEMICAL NEWS Office, Boy Court, Ludgate Hill, London, E.C.

LIMITED.

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Detailed Specifications and Forms of Tender, and any other proximo, at the Company's Registered Office, 7, West George Street, necessary information, may be obtained, on and after Monday, 24th Glasgow. Parties to state whether they propose to Tender for one or two years, or for both periods.

Patterns of the General Stores may thereafter be seen at the Company's Addiewell Works, near Westcalder; and Patterns of Lamp Fittings at their Lochrin Works, Edinburgh.

Tenders, endorsed "Tender for Stores," to be lodged with the undersigned on or before Monday, 7th proximo.

The Directors do not bind themse.ves to accept the lowest or any offer. JOHN FYFE, General Manager.

Merchants' House Buildings,
7, West George Street.
Glasgow, 17th March, 1879.

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