Advertisements.

L. OERTLING, knowing that stands of his
Balances are now being sold with beams which
are not his manufacture, and vice versa, thereby
making apparently two OERTLING’s Balances
instead of only one, begs to notify that all
Balances manufactured by him bear his name
hoth on beam and stand.

{Cen News
Dec. g, 1881,

TE TR ————————"

F. E. BECKER & CO.
WHOLESALE EXPORTERS, IMPORTERS, AND Muvuraeruanss,
34, Maiden Lane, Covent Garden, London, W.C.,
Beg to recommend to Professors of Universities, Colleges, and Schools, Analysts, Dealers, and others
, their well-assoried and large stock of every description of ,
Chemical and Physical Apparatus, Pure Chemicals, de.
NEW ILLUSTRATED PRICE LIST ON APPLICATION.

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MAWSON & SWAN,
LABORATORY OUTFITTERS,
IMPORTERS & MAKERS OF PHILOSOPHICAL INSTRUMENTS,
CHEMICAL, ELECTRICAL, AND OTHER APPARATUS.

TOWNSON & MERCER,
89, Bishopsgate Street Within,
LONDON.
Wholesale and Export Dealers and Manufacturers of
CHEMICAL & SCIENTIFIC APPARATUS,
PURE CHEMICALS, &c.,
For Analysis and the general Laboratory Use of Manufatturers
and Professors of Universities, Schools, Mines, &c.
Now ready,
TOWNSON & MERCER'S COMPLETE CATALOGUE of
Chemical and Scientific Instruments, Pure Chemicals &ec. Demy
Bvo. Illustrated with upwards of 8oo Woodcuts, Price 2s. 6d.,
20st free.
Silicates of Soda and Potash in the state of
Soluble Glass, or in CONCENTRATED SOLUTION of first
juality, suited for the. Manufa&ure of Soap and other purposes,
supplied on best terms by W GOSSAGE and Sons, Soap
Works, Widnes, Lancashire.
London Agents, COSTE and Co., 19 ani 20, Water Lane, Tower
Street E.C., who hold stock ready for delivery

BIRKS & CO.,
CARBOLIC ACID MANUFACTURERS, TAR
DISTILLERS, de.

MAWSON & SWAN have an extensive assortment
of all kinds of Chemical and Scientific Apparatus, Pure
Chemicals, and Reagents.
Sole Agents for the sale of BUNGE’s Celebrated Balances
and Weights of Precision.
13 & 15: MOSLEY STREET:
NEWCASTLE-ON-TYNE,

CARBOLIC ACID.
No. 1.—Crys. at 34°35° C.
} No. 2.—Crys. at 28°29° C.
Liquid Carbolic, straw-coloured and water-white,
Aurine, Carbolic Disinfedting Powder, 10%, 15%, and
20%. All warranted unadulterated.
Tar Products of all kinds.
WORKS—CLAYTON, NEAR MANCHESTER.