Obrazy na stronie
PDF
ePub

72

Composition and Quality of the Metropolitan Water.

[ocr errors]
[blocks in formation]

Jablochkoff waxed for a period short compared to that in which it waned, in London it waxed for longer than it waned, which was of course an improvement; and Mr. Shoolbred suggested that it might be due to the fact that the engine worked at a speed nearer to that of the machine, and that the machine was founded more solidly in London than in Paris.

Mr. WERDERMAN said that it was a mistake to cali his lamp an incandescent one, the fact being that all carbon lamps gave light from the incandescence of the positive carbon, and that a small are was formed in his lamp between the two electrodes, which could be varied by the pressure between them. He maintained that it was as easy to produce 500 lights as 10 from the electric light by sub-division, as he hoped soon to show, and stated that the size of the carbons greatly controlled the intensity of the light.

Prof. AYRTON held that the obstacle to the sub-division of the electric light was not an electrical one, but was due to the fact that the amount of light produced by the current is not in direct proportion to the amount of the heat produced.

In contradiction to Prof. Ayrton, Mr. WERDERMAN stated that in the electric arc the opposing electromotive force was proportional to the original electromotive force. Prof. SYLVANUS P. THOMSON pointed out that residual magnetism in the cores of the bobbins of dynamo-electric machines lowered their efficiency, and hence short cores, as in the Wallace-Farmer machine, were an improvement.

Mr. SHOOLBRED gave an account of electric lighting, illustrated by diagrams of the most recent magneto- and dynamo-electric machines and examples of the lamps in vogue. The only surviving magneto-machine is that of De Meriten's, which is incomparably superior to the older ones. of Nollet and Holmes. The dynamo-electric machines described were the continuous-current machines of Siemens, Gramme, Wallace-Farmer, and the alternatingcurrent machines of Wilde, Gramme, and Lontin. Wilde's machine is the first of these, or parent machine, and Lontin's so resembles it that the latter cannot be used in England. In these machines the current from a continuous machine is passed through a second machine, which yields the alternating currents. In Lontin's machine, also, a number of distinct currents are generated in separate circuits, each of which is capable of feeding several lights. There is now one in use on the Western Railway of France which gives three distinct currents, each of which supplies four different lamps, making a total of twelve lights. The American Brush machine was also mentioned. The Dubosq lamp, which was the first regulator, is well adapted for laboratory purposes, but for practical purposes the Serrin is preferable. Rapieff's lamp is used in the Times office. The De Mersanne, which was highly spoken of at the Paris Exhibition, moves the carbons by bevelled gearings. The Wallace-Farmer lamp, though durable, is unsteady, perhaps because only inferior gas carbon has yet been used. Jablochkoff's candle was found to be defective from the solid insulator, such as plaster, used between the carbon. This made it very expensive also. Experiments in Paris had shown that whereas Jablochkoff's system cost rod. per hour per light, EDINBURGH UNIVERSITY CHEMICAL SOCIETY the other systems cost only one half of that. In Wilde's candle the solid insulator was dispensed with, air taking its place, the arc always tending to keep at the top of the candle by electro-dynamic repulsion. In the De Meriten's candle three strips of carbon were used, the intermediate one being a stepping-stone to the arc which passes between the two outer ones. Werdermann's and Reynier's so-called incandescent lamps were also shown. Mr. Shoolbred, after alluding to the fact that the upper (posi-sisted of specimens of all the commercial products of the tive) carbon takes a crater form, and hence becomes a reflector shedding the light downwards, stated that experiments had proved the line of maximum intensity of light to pass downward at an angle of 60° to the axis of the vertical carbons. By giving the positive carbon a horizontal displacement behind the lower negative one, Mr. Douglas, of the Trinity House, had been able to raise this line till it became horizontal, an advantage in lighthouses. He also pointed out that, whe eas in Paris the COMPOSITION AND QUALITY OF THE JANUARY, 1879.

January 29, 1879.

[ocr errors]

ALEXANDER MACFARLANE, D.Sc., F.R.S.E., in the Chair. A PAPER was read by Mr. J. S. THOMSON, on "Paraffin and what is got from it, as illustrated by Exhibits at the Paris Exhibition of 1878.'" A full account was given of the modes of preparation of these exhibits, which conAddiewell Chemical Works. These included naphtha, burning oils, lubricating oils, solid paraffin in blocks (weighing not less than 7 cwts. each), sulphate of ammo. nia, and candles of various kinds made from the paraffin wax. The methods of preparation of other products of paraffin were also explained; of normal paraffins, alkaline bases of the leucoline series found in the acid tars, phenols and analogous bodies found in the soda tars, chrysin and paraffins of various melting-points, from 21° to 65'5° C.

METROPOLITAN

THE following are the returns of the Society of Medical Officers of Health:

[blocks in formation]

WATER.

[blocks in formation]

Grs, Grs. Grs. Grs.

[blocks in formation]

Slightly turbid 0'000
Clear
0'000
Slightly turbid

0'000

Ο ΟΙΙ

[blocks in formation]

0012 0165 0130 2140 9'230 0720 0.72 0015 0165 0120 20'00 9'120 0648 072 0105 0135 18 20 6'770 0*756 0.72 0'000 0.007 0210 0033 20'10 9'010 0*648 072 0'000 0·009 0135 0037 21:30 7590 0612 072

Grs. Grs. Grs.

Grs. Grs.

Degs. Degs

[blocks in formation]
[merged small][merged small][merged small][ocr errors][ocr errors][merged small][ocr errors][merged small][merged small]

0'000 0'003 0'435 0'002 29'30 10°580 0.936 1.29 0'000 0'007 0165 0030 21:30 8730 0.684 0.72 Ο ΟΙΙ 0135 0049 23:00 7.630 0720 0'79 The quantities of the several constituents are stated in grains per imperial gallon.

[blocks in formation]

NOTE. The amount of oxygen required to oxidise the organic matter, nitrites, &c., is determined by a standard solution of permanganate of potash acting for three hours.

C. MEYMOTT TIDY, M.B.

3·260 19:46′50

CHEMICAL NOTICES FROM FOREIGN | mining the free acid in sulphate of alumina, &c. So long

SOURCES.

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

Comptes Rendus Hebdomadaires des Séances, l'Académie de des Sciences. No. 3, January 20, 1879. Observations on M. Pasteur's Second Reply.-M. Berthelot. The author points out that M. Pasteur, though declaring beer to be anaerobian, admits that this supposi

tion has not been demonstrated.

Reply to the Notes of M. Trécul of Dec. 30 and Jan. 13.-M. Pasteur.-A continuation of the controversy on aærobian and anærobian organisms.

Temporary Magnetic Powers Developed by Influence in Certain Specimens of Nickel and. Cobalt as Compared with Iron.-Henri Becquerel.-Bars of nickel become saturated more rapidly than bars of iron, and consequently setting out from a certain intensity a bar of nickel becomes a temporary magnet almost constant, while iron becomes magnetised more for growing intensities. The difference between the magnetic properties of bars of iron and nickel are so much the more considerable as the conditions of magnetic are nearer to those which determine saturation in one or the other.

Classification of Colours and the Means of Re-producing Coloured Appearances by Three Special Photographic Proofs.-C. Gros.-The author distinguishes two categories comprised under the word colours: lights and pigments. The elementary lights which by their mixture produce all kinds of shades are the green, violet, and orange rays. The elementary pigments which by their mixture produce all kinds of shades are red, yellow, and blue. To obtain directly the elementary tints of rays and of pigments it is sufficient to look through a prism at a white stripe upon a black ground, and at a black stripe upon a white ground. In the first case we see an orange, green, and violet spectrum, and in the latter case a blue, red, and yellow spectrum. In the former case the orange, green, and violet are elementary rays, and in the latter the red, blue, and yellow are rays combined two and two. The author then exhibits and describes an apparatus, which he names the chromometer, and by means of which he produces the protographic effect above mentioned.

Researches on the Effects of Induction Across

Telephonic Circuits by Means of the Microphone and the Telephone.-D. Hughes.-Taken from an English source.

New Voltaic Element with a Constant Current.A. Héraud.-The author uses as an exciting liquid hydrochlorate of ammonia; the depolarising body is mercurous chloride. When the circuit is closed the hydrochlorate of ammonia in presence of zinc gives zinc chloride, forming ammonia and hydrogen, which two bodies go to the positive electrode. The hydrogen reduces the mercurous chloride, producing metallic mercury, hydrochloric acid, and consequently hydrochlorate of ammonia. As long as there exists mercurous chloride around the positive electrode, hydrochlorate of ammonia will be regenerated.

[ocr errors]

as no free acid is present the yellow colouring-matter remains unchanged. If there is the smallest excess of hydrochloric acid the colour turns first to magenta, then to orange, and after a few seconds disappears entirely. The author has tested a number of the azo colouringmatters, and has found that they are all indifferent to free carbonic acid, and are capable of marked changes of colour in presence of the slightest excess of mineral acid, or inversely. These changes are most beautifully shown by Poirrier's Orange III. (dimethyl-anilin-diazosulphobenzolic acid), by diazo-a-sulpho-naphthylic acid, and amido-benzol. Tropeolin 000 is suitable for the detection of alkali (caustic or carbonated), as it undergoes the opposite change of colour from tropeolin OO, being yellow in an acid solution and magenta-red in alkaline liquids. Weaker acids-such as the sulphurous, oxalic, &c.-produce less distinctly marked changes of colour. Acetic acid, like the carbonic, is indifferent to the azo-compounds. Hyposulphite of soda behaves exactly like the salts of strong mineral acid. With the aid of these indicators soda-ash, &c., may be titrated in the cold.

Les Mondes, Revue Hebdomadaire des Sciences. No. 16, December 19, 1878.

This issue contains no original chemical matter.

No. 17, December 26, 1878.

The only original chemical matter in this issue is a description of the celebrated aniline-colour works of A. Poirrier, at St. Denis, and of the dyes which have been

either invented or at least manufactured there. The writer enumerates as such-Violet (produced with potassium bichromate); dimethyl-anilin violet, otherwise known as Paris violet; benzylated dimethyl-anilin violet, purer in tone than Paris violet, and capable of being applied upon wool in presence of acids; methyl-anilin green, formed by acting upon the violet with methylchloride; dibenzyl-anilin green, which has not proved commercially successful by reason of its very sparing solubility; phenylen-diamin brown and chrysoidin; cachou de Laval, otherwise known as the patent colours of Croissant and Bretonnière, formed by the action of sodium sulphide upon organic matter. (This colour does not seem to possess any distinctive novelty, and, though exceedingly fast, yields dull shades.) Mention is next made of the oranges and rocellin. The last of these colours is obtained by the reaction of the diazoic derivative of sulpho-conjugated naphthylamin upon naphthol B; the shade produced is very like that of orchil, but brighter, faster, and more economical.

Nos. 1 and 2, January 2 and 9, 1879. These issues contain no original chemical matter.

Revue Universelle des Mines, de la Metallurgie, &c.,

Tome 4, No. 2, September and October, 1878. Caldwell on the determination of phosphorus in ores of The only chemical paper here is a note by Prof. J. B. iron, and in cast-iron and steel, taken from the New York Metallurgical Review.

Tetric Acid and its Homologues.-Eug. Demargay. -An account of the tetric, pentic, hexic, isohexic, and heptic acids. These acids agree very closely in their Berichte der Deutschen Chemischen Gesellschaft zu Berlin, chemical properties, and are coloured a violet-red by ferrous chloride.

[blocks in formation]

No. 14, 1879

1111678

Transformation of Dibromethylen into a Keton with Four Atoms of Carbon by Means of Hypobromous Acid.-E. Demole.-The author considers it as established that on the oxidation of dibromethylen there is really formed a transition compound, bromacetylen, in the nascent state. At low temperatures this compound

74

Chemical Notices from Foreign Sources.

CHEMICAL NEWS,
February 14. 1879.

that Baron Muller, of Melbourne, who discovered the species, also denies that it contains quinin.

On Diphenyl Benzols.-H. Schmidt and G. Schultz. authors seek to ascertain the relation-if any-of violanilin to diphenyl-benzol.

Amidins and Thiamids of Mono-basic Organic Acids.-A. Bernthsen and H. Trompetter.-The authors give an account of ethenyl-tolyl-amidin, benzenyl-naphthyl-amidin, ethenyl-naphthyl-amidin and certain of its salts, benzo-thio-toluidid, aceto-thio-toluidid, benzonaphthyl-thiamid, aceto-naphthyl-thiamid, benzamidotolyl-thiamid, benzyl-anilin, and ethyl-naphthyl-amin. Certain Double Salts of Bivalent Iridium.-C. Seubert.-An examination of the iridic double salts of sodic bisulphite.

becomes polymerised, resuming HBr, whilst at higher
temperatures it takes up simultaneously oxygen and hydro-
bromic acid, and is converted into bromacetyl-bromide.
Separation of Zinc and Nickel.-F. Beilstein.-The-The
sufficiently diluted solution of the nitrates or sulphates is
mixed with ammonia till an alkaline reaction is obtained,
and then acidified with pure citric acid. When the solu-
tion is perfectly cold sulphuretted hydrogen is introduced
till the liquid has a distinct smell, which is generally
effected in five to ten minutes. If much zinc is present
sulphuretted hydrogen is introduced for five minutes at a
time, letting the liquid stand after each introduction, and
repeating this till the smell of the gas does not disappear
on standing. In this manner we avoid a needlessly long
treatment with sulphuretted hydrogen by which traces of
nickel sulphide may be carried down. The precipitate of
zinc sulphide is allowed to stand for twenty-four hours
in the cold, and is then weighed as such. The filtrate is
Evaporated to a small volume, and after supersaturation
with ammonia the nickel is thrown down electrolytically,
in which operation care must be taken that no sal-am-
moniac is present, as it hinders the precipitation of nickel.
The solution should be a nitrate.

On B-Chlorcymol from Thymol.-E. v. Gerichten.—
A hypothetical and controversial paper, not susceptible of

useful abstraction.

Certain Fluorine Compounds of Vanadium.-H. Baker. A valuable and detailed account of the formation and properties of the fluoxy-vanadiates of potassium, ammonium, and zinc, and of fluoxy-hypo-vanadiate of ammonium.

Certain New Derivatives of Benzoic Acid.-P. Griess. The author describes -nitramido-benzoic acid, E-oxy-nitro-benzoic acid, a-oxy-nitro-benzoic acid, and y-oxy-nitro-benzoic acid.

Halogen Substitution - products of Ethan and Ethylen (Eleventh Communication).-W. Stædel.-An account of the hexa-chloride of carbon and of the somewhat numerous chlorobromo- and bromo-substitution products of ethan and ethylen.

Compounds of Organic Bases with Mercuric Chloride.-Otto Klein.-In this memoir the author describes certain mercuric compounds of dimethyl-anilin. On Isoindol (Thirteenth Communication).-W. Stædel and M. Kleinschmidt.-1scindol presents one of the most interesting cases of pleochroism. If a columnar crystal is held to the light and slowly turned on its axis it appears in succession green, yellow, deep red, blue, and indigo

blue.

Dinitro-benzo-phenon and Dioxy-benzo-phenon.W. Stædel and E. Sauer.-Dinitro-benzo-phenon is most readily obtained by the oxidation of dinitro-diphenylmethan. Dioxy-benzo-phenon is best prepared from the hydrochlorate of diamido-benzo-phenon.

Brom-nitro- and Brom-amido-anisols.-W. Stædel and G. Damm.-Not suitable for abstraction.

On Uvic Acid.-W. Stædel.-During an attempt to resolve synthetic uvic acid into dextro- and lævo-tartaric

acid a solution of the neutral sodium-ammonium salt was prepared. From this solution there were at first deposited large well-developed crystals of the monoclinar system, on which there were no hemihedral surfaces, and whose solution was optically inactive. In the mother-liquor of these crystals there appeared the rhombic crystals of the two sodium-ammonium tartrates, with their usual hemihedral surfaces.

Atomic Weight of Iridium.-C. Seubert. - The author's determinations give as a mean result 192744 (H=1). He points out that Berzelius admits the presence of osmium in the iridium which he employed.

On Diphenyl Bases.-H. Schmidt and G. Schultz.The authors have undertaken a complete examination of all the known amido-compounds of diphenyl.

Supplementary Remarks on Alstonia Constricta. O. Hesse. The author, in the former paper, questioned the presence of quinin in Alstonia bark. He now learns

On Absorption Spectra.-J. Landauer.-A spectroscopic examination of safranin. The author not merely agrees with Vogel in doubting the universal applicability of the proposition that every chemical compound has its specific spectrum, but concludes that absorption spectra throw light upon the constituents of a compound only in so far as the colour of a body can be regarded as characteristic of its chemical composition. For the accurate determination of colours the spectroscope is as serviceable as is the microscope for the determination of forms.

Action of Dry Gaseous Hydrochloric Acid upon Sulphates.-C. Hensgen.-In this memoir the author describes the action of dry hydrochloric acid gas upon ferrous sulphate. At elevated temperatures the anhydrous salt is decomposed, and pure anhydrous ferric chloride is formed. From the hepta-hydrated salt was obtained Fe2C162H2O in green acicular crystals, and FeSO46H2O in tabular plates.

MISCELLANEOUS.

Royal Commission.-The Queen has approved the appointment of Mr. Warington W. Smyth, F.R.S., Sir George Elliot, M.P., Mr. F. A. Abel, C.B., Mr. Thomas Burt, M.P., Mr. Robert Bellamy Clifton, F.R.S., Prof. Tyndall, F.R.S., Mr. Lindsay Wood, and Mr. William Thomas Lewis, as Her Majesty's Commissioners for the purpose of inquiring and reporting whether, with respect to the influence of fluctuations of atmospheric pressure upon the issue of fire-damp from coal, to the adoption and efficient application of trustworthy indicators of the presence of fire-damp, and generally to systematic observation of the air in mines, to improved methods of ventilation and illumination, to the employment of explosive agents in the getting of minerals, and to other particulars relating to mines and practicable expedients that are not now in use and are mining operations, the resources of science furnish any calculated to prevent the occurrence of accidents or limit their disastrous consequences.-Times.

Moist Water Colours for Students.-Lechr tier Barbe, and Co. have issued a set of student's moist water colours in tin pans. These moist colours are said to be pure, unadulterated pigments. The use of water colours in the moist state, with artists, has almost superseded that of dry cake colours. The latter may have a superiority in with more fredom and rapiditiy, have come to be genesome instances, yet the moist, affording a supply of colour rally preferred, and the only obstacle to their being more extensively use still has hitherto been their high price. The shilling box contains the ten colours and three brushes as recommended by the Society of Arts. The main and novel feature of the box is that the colours are

NEWS

14, 1879

contained in small tin pans; that these pans are removable, and that, when used up, any of them can be replaced by another one, just as in artists' colour boxes. Thirty of the most useful moist colours are manufactured and sold in those small tin pans; so that additional colours may be put in the box, in order to bring it fully within any object in view in water-colour drawing.

MEETINGS FOR THE WEEK.

MONDAY, 17th.-Medical, 8.30.

London Institution, 5.
Society of Arts, 8. "Dwelling Houses: Their
Sanitary Construction and Arrangements," by
Dr. W. H. Corfield, M.A. (Cantor Lectures)
"Animal Development,"

TUESDAY, 18th.-Civil Engineers, 8.

Royal Institution, 3.

Pro. Schäfer.

Zoological. 8.30.

WEDNESDAY, 19th.-Society of Arts, 8.

"Turkish Resources and
their Ready Development," by J. L. Haddan.
Meteorological, 7.

Society of Public Analysts, 8. "On the Influ-
ence of the Decomposition in Butters from Age
on the Specific Gravity of the Fat and the Per-
centage of Soluble and Insoluble Acids," by E.

[blocks in formation]

Atomic Weights and Factors-Useful Data-Chemical Calculations -Rules for Indirect Analysis-Weights and Measures-Thermometers and Barometers-Chemical Physics-Boiling-points, &c.Solubility of Substances-Methods of obtaining Specific GravityConversion of Hydrometers-Strength of Solutions by Specific Gravity-Analysis-Gas Analysis-Water Analysis-Qualitative Analysis and Reactions-Volumetric Analysis-Manipulation-MineralogyAssaying Alcohol- BeerSugar - Miscellaneous Technological Matter relating to Potash, Soda, Sulphuric Acid, Chlorine, Tar Products, Petroleum, Milk, Tallow, Photography, Prices, Wages, &c. London: E. and F. N. SPON, 46, Charing Cross. New York: 446, Broome Street.

A Young Man (18) wishes to be engaged for

three years in the Laboratory of a Chemical Works. Period of instruction two years.-Address, F. W. S., 47, Necheil's Place, Birmingham.

W. T. Jones, F.C.S." Notes on the Analysis Manager of Tar and Ammonia Distillery will

of Butter," by J. M. Milne, M.D. "On Con-
densed Milk," by O. Hehner, F.C.S.
"On
Analysis of Coffee Leaves," by O. Hehner,
F.C.S. "On the Falsification of Milk," by C.
A. Cameron, M.D.

THURSDAY, 20th.-Royal, 8.30.

Royal Institution, 3. "Sound," Prof. Tyndall.
Royal Society Club, 6.30.

Chemical, 8. "Investigations into the Action of

be disengaged on February 10, and will be open for Re-engagement. Advertiser has a good practical knowledge of the business, and is a steady energetic man.-Address No. 60, CHEMICAL NEWS Office, Boy Court, Ludgate Hill, London, E.C.

Situation wanted by a Competent Analyst as

Assistant or Principal. Good teacher. Apply, Public Analyst, CHEMICAL NEWS Office, Boy Court, Ludgate Hill, London, E.C.

Substances in the Nascent and Occluded Con- Wanted, a Situation in Works, Laboratory,

ditions: Hydrogen (continued), by Dr. Gladstone and Mr. Tribe. "On some Methods of Vapour Density Determination," J. T. Brown. "On the Quantitative Blowpipe Assay of Mercury," by G. Attwood. FRIDAY, 21st.-Royal Institution, 9. "A New Chemical Industry,"

Prof. Roscoe.

[blocks in formation]

Patent Office, or as Teacher of Chemistry and Chemical Technology by a Scientific Chemist of great practical experience, and well up in English, German, and French.- Address, P. 1)., CHEMICAL NEWS Office, Boy Court, Ludgate Hill, London, E.C.

TO PAPER MAKERS, CHEMICAL MANUFACTURERS,
AND OTHERS.

TO LET, at Low Rentals, Works and Land

in Plots of Two to Ten Acres, near Swansea. Coals obtainable from 4s. 6d. per ton. Water good and abundant. Any description of manufactory can be carried on. Excellent Railway, Canal, and Dock accommodation close at hand.-Apply to Richard Hall, Esq., 37, Great George Street, Westminster, or Mr. Thomas Williams, Aberdulais, Neath, Glamorganshire.

The Authors of "A Practical Treatise on the

Manufacture of

SULPHURIC ACID,"

with nearly 100 new illustrations (Sampson, Low, and Co., 188, Fleet Street, E.C.) are prepared to furnish plans and advice and superintend the erection of plant in all parts of the world. Address, L. and L., CHEMICAL NEWS Office, Boy Court, Ludgate Hill, London, E.C.

SCIENCE BERNERS College of CHEMISTRY.

[blocks in formation]

IX. On the Transmission of Power by Means of Electricity. By Profs. Elihu Thomson and Edwin J. Houston. Correspondence-The Band-Pattern in Animals-The Sea-Sei pent. Reviews of Scientific Works-Science Notes-Proceedings of Scientific Societies.

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

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,
Celebrated

MANUFACTURERS of the

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

TESTIMONIAL.

"We have used the Blue Staffordshire Brick for Sulphuric Acid Towers, &c., manufactured by Messrs. Field, for the last fifteen years, during which time they have given great satisfaction. We recommend them to the Chemical Trade, believing there is nothing better in the market." (Signed) WILLIAM HUNT and SONS, Lea

MR. COX, VALUER OF CHEMICAL PLANT, Alkali Works, near Wednesbury, Staffordshire, February, 1878.

offers his services on the usual terms. Twenty years' experi ence, Estimates for all description of plant, plans, &c.-Glenmohr House, New Charlton London, S.

TOLL END BRICK-WORKS,
TIPTON, STAFFORDSHIRE.

[blocks in formation]

CLEVELAND CHEMICAL WORKS, MIDDLESBROUGH;

Newfall Tar Works, Carlton; Ammonia Works, Stockton-on-Tees; and Stamshaw Chemical Works, Portsmouth. And also of the Furness Tar Products Co., Ulverston.

Manufacturer of Benzole, Toluole, Xylol,

Solvent and Burning Naphthas, Carbolic Acid and Disinfecting Powder, Refined Anthracene,Naphthaline, Black Varnish, Refined Tar, Crude Liquid Ammonia, Coal-Tar, Pitch, Creosote, Grease, Sulphate of Ammonia, Pyroligneous Acid, Acetate of Lime, Wood Naphtha, Charcoal, &c., &c.

S.A. S. is always a buyer of Coal-Tar Naphthas, Crude Anthracene and all Tar Products.

All communications to be addressed to the offices at Middlesbrough

BISULPHITE OF LIME.
BISULPHITE OF SODA.

WILLIAM MARRIOTT

CHEMICAL WORKS, HUDDERSFIELD

PATENTS. Mr. Vaughan, F.C.S., British,

Foreign, and Colonial PATENT AGENT. Special attention given to Inventions relating to Chemistry, Mining, and Metallurgy Guide to Inventors" Free by Post.-Offices, 67, Chancery Lane London, W.C., and 8, Houndgate, Darlington.

SCIENTIFIC

ENGRAVINGS

carefully

SPECIALITIES.

MANGANESE Lump, Crystallised, Ground, and Prepared

ARSENIC

Large stock of every description.

*** Suitable for all Trades.

Refined powdered, Lump, Grey, and Ruby.

FLUOR-SPAR Finest produced.

BARYTES

BAUXITE

purposes.

Medium and Common for all

Carbonate and Sulphate. All qualities of Lump

and Ground.

Of high percentage of Alumina and low in Iron. CRYOLITE, MAGNESITE, CHROME ORES, EMERY STONE, AND ALL MINERAL ORES &c.

GEO. G. BLACKWELL.

MINERAL AND CHEMICAL BROKER, 5, CHAPEL STREET, LIVERPOOL NOTE.-SPECIAL ATTENTION is directed to my CARBON. ATE AND SULPHATE OF BARYTES as the finest produced, being clean, crystallised, free from Lime, and of the highest test.

EARP & CHASTER,
RUNCORN,

MAKERS OF

[blocks in formation]

executed, enlarged, or reduced from photographs. DIAGRAMS drawn and engraved on wood. Electrotypes supplied at Moderate Prices. Specimens and Estimates sent post free. Fac Simile of Signature for 35. A perfect re-production of any name guaranteed. IMPORTANT TO MANUFACTURING EXPERIMENTAL CHEMIST S

[blocks in formation]

To Ladies and Gentlemen with some leisure throughout the Kingdom. Wholesale of Barclay and Sons; Bur

time, desiring to supplement their incomes, an opportunity is

offered of acquiring the ART of DRAWING and ENGRAVING on Wood in a thoroughly satisfactory and perfect s vle. The terms

E. MOORE AND CO.,

are moderate, and the hours can be made to suit the convenience of 29, POLYGON, AND HENRY ST., MARYLEBONE RD., N.W. Pupils. Persons residing in the country can receive full instruction by correspondence.

For further particulars ca or address

Water-glass, or Soluble Silicates of Soua Mr. J. FRANKLIN NASH Artist and Engraver, or in solution, at KOBERT RUMNEY'S, Ardwick Chemical

75 FLEET STREET LONDON, E,C.

and Potash, in large or small quantities, and either solid

Works Manchester.

« PoprzedniaDalej »