fHE

AND
JOURNAL OF PHYSICAL SCIENCE
Won Bid by 0] (WITH WHICH IS INCORPORATED THE “CHEMICAL GAZETTE!) | PS sii
Vol. 44—No. 1130.) S45ek Friday, July 22, 1881. a Newspaper. boos Fare, ahd,

ARTICLES:— Pace
Colliery Explosions, by F. A. Abel, C.B., F.RS, P.L.C,, &Cuveress 39
Note on the Spectrum of Carbonic Acid, by Charles Wesendonck,
Berlin. Communicated by Prof. Helmholtz, For. Mem. R.S.... 42
Determination of Chromium in Chrome Iron Ore, by H. N. Morse
and W.C. Day .eoeseroceccusscnssivesnnne - Sess 43
Note on Sulphuretted Hydrogen, by P.Casamajos.cvveseecacases 44
On Microlite from Amelia Co., Virginia, by F. P. Dunnington.... 44
NoTices or Books.—Annual Report of the Board of Regents of
the Smithsonian Institution for the Year 187g~—Spon’s Encyclo.
sedia of the Industrial Arts, Manufactures, and Comusercial
broduats Eee R EEE LEE sre serra as as ansanshneve 48
CorRESPONDENCE.—On a New Method for the Estimation of
Nitrates in Potable Water—Beta-naphthol-sulphonic Acid ..... 46
CHEMICAL NOTICES FROM FOREIGN SOURCES... ----ccessees 47

CONTENTS.

CAPPER PASS AND SON, BRISTOL,

ARE BUYERS OF
LEAD ASHES, SULPHATE OF LEAD,
LEAD SLAGS, ANTIMONIAL LEAD,
COPPER MATTE, TIN ASHES, &c.,
and DROSS or ORES containing
COPPEP, LEAD, AND ANTIMONY.

INSTITUTE OF CHEMISTRY.

N OTICE.—The next Examination in Practical
Chemistry in connection with the Institute will be held on
MONDAY, 220d AUGUST, and four days following. Candidates
for the Assomuieshlp who intend entering for this Examination should
commuricate with the Secretary, Mr. CHARLES E. GROVES, at Someret
 House Terrace, W.C., before the 13th August
MINERAL OIL REFINERY.

TO BE SOLD, as a Going Concern, a Works
producing firat class Lubricating Oils for Spindles and other
urposes, Paraffin Scales, &c., which have obtained a high standard
n the market, and for which there exists a good selling connection in
London, Manchester, and other distrits. The Works adjoin the
North Staffordshire Railway, with siding accommodation, and are
also conveniently situated for water carriage by canal. The Sant
:onsists of steam engines, boilers, stills, agitators, modern flterpresses,
 double freczing machine, hydraulic press, complete laboraory,
 &c., and is capable of working about fifty tons of raw material
ser week. Satisfactory reasons given for disposing of business. —
For cards to views or further particulars apply to Mr. J. R. Wain
Tunstall. Staff

FOR © SALE.—A very superior Analytical
4 Balance by C. Becker, London. The owner having no use for
t will be willing to part with the same on very reasonable terms.—
Apply, personally or by letter, to Mrs, H. Fripp, 6, Arlington Villas
Clifton, Bristol. ’
VV anted, a Partner with £3000 or £4000 to
_join Advertiser in Chemical Trade. —Address, A, B., care Lee
and Nightingale, Advertising Agents, Liverpool.
BRADY & MARTIN,
NEWCASTLE-ON-TYNE,
Will, on application, forward Catalogues of Chemical and Physical
Apparatus, Pure Chemicals: Special Reagent Bottles with Embossed
Labels, Nitrometer, &c¢., &C.

GRIFFIN'S
CHEMICAL HANDICRAFT,
SECOND EDITION.
Price 4s. 7d. post free,
A CATALOGUE OF CHEMICAL APPARATUS:
ILLUSTRATED, CLASSIFIED, DESCRIPTIVE.
Demy 8vo., 480 pp., lllustrated with 1600 Woodcuts.
Most complete and cheapest List of Apparatus.

JOHN J. GRIFFIN and SONS, 22, Garrick Street,
London, W.C.
THE JOURNAL OF SCIENCE
tor JULY (Price 1s. 6d.), include—
The Source of Electric Energy. By Charles Morris.
A Hanif of “ Nuces Zoologice.” and their Cracking. By J. W.
ater.
An Estimate of Auguste Comte. By G. H. C.
Physiology of Mind-Reading. By George M. Beard, M.D,
Analyses of Books. Correspondence. Notes.
_ } London: 3, Horse-Stoe Court, Ludgate Hill,
W 7ATTS'S DICTIONARY of CHEMISTRY.
The THIRD SUPPLEMENT, Part II (or Vor. VIII,
Part I1.), now ready, price 50s., completing the Record of Chemical
Discovery to the end of the year 1878, including the more important
Discoveries made in 1879 and 1880,
London: LONGMANS & CO.
Royal 8vo,, cloth, 18s., ‘
A PRACTICAL TREATISE: ON THE
MANUFACTURE OF STARCH, Glucose, Starch-Sugar,
and Dextrine, based on the German of L. Von Wagner and other
authorities. By JuLius FrRaNkeL. Edited by R. HuTTER, Proprietor
of the Philadeiphia Starch-Sugar Works.
London : E. and F. N. SPON, 16, Charing Cross.
A Chemist (F.I.C.), with 15 years’ Analytical
and Manufa@uring experience and first class references, is open
to an Engagement, in or near London, for two or three days per week,
~—Address, A.A,, CHEMICAL NEws Ofiice, Boy Court, Ludgate Hill,
T.ondon, E.C.
rT ——— i gy ———rg—
A Foreman wants a Situation in a Chemical
Works. Understands making sulphate and liquor ammonias by
he newest methods, also tar distilling and making animal eharcoal
and products.’ Good references.—Address, D. Z.,at C. H. May and
Co.'s General Advertising Offices, 78, Gracechurch Street, E.C.
\ A 7anted, by the Advertiser, who has had
upwards of ten years’ practical experience in the manufacture
of Nitro-glycerin, Dynamite, Lithofracteur, Gun-cotton, Nitric and
Sulphuric Acids, a Situation as Manager or Assistant Manager in an
Explosive or Chemical Faétory, at home or abroad.—Address,
s Mitro-compounds,” CHEMICAL NEws Office, Boy Court, Ludgate
Jill, London, E.C.
Xe WM. WEBB and CO, in Liquidation, Cobalt and Nickel Refiners,
Wainwright St., Aston.
FOR SALE, by Private Contract, the above
Old-Established Business. The premises are admirably
adapted to the purpose required, no expense having been spared in
erections and necessary Plant, which includes all the latest inventions
and improvements. Stock-in-trade and loose Plant only to be taken
to at valuation, ‘The premises are leasehold, with power to purchase
(he freehold at a fixed sum at any time previous to the expiration of
the lease.—For further particulars spply to the Trustee, Mr. Joux
LEWIS, Chartered Accountant, 1, Temple Row West, Birmingham.