Advertisements.

L. OERTLING, knowing that stands of his
Balances are now being sold with beams which
aire not his manufa@ure, 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
both on beam and stand.

Lg News,
Juyl 2, 1880.

_

To WY o

UNIVERSAL
FILTER-PRESSES WITH FRAMES,
THE BEST FILTER-PRESS ON THE MARKET,
OF
WEGELIN & HUBNER, HALLE ON SAALE, GERMANY,
ENGINEERS AND IRONFOUNDERS,
Made in Wood, Iron, Bronze, or Lead, for the Filtration or Separation of Liquids from Solid Matters, with
without attachment, for the perfe& washing of the latter.

Alum, Aniline, Alizarine, Anthracene, Barytes, Blanc-fix, Berlin Blue, Beer Wort, White Lead, Carmine, Sulphate of Quinine
Carbonate of Magnesia, Caustic Soda, Ceresine, Chrome Colours, Tartaric Acid, Cream of Tartar, Gelatine, Glue, Glycerine, Graphite
Hydrated Alumina, Oxide of Nickel, Paraffine, Prussiate of Potash, Pyroligneous Acid, Printing Ink, Phosphoric Acid, Salt Brine,
Betjoyie Acid, Silicate Paints, Starch, Porcelain, China Clay, Glucose, Stearine, Ultramarine, Yeast, Zinc-white, Sugar, and Sugar
efineries pp. .
Experiments with Substances to be Filtered are carefully made in our Testing Shop.
Price and Reference Lists will be sent on application.

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

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
aud Weights of Precision.

183 & 15, MOSTEY STREET
NEWCASTLE-ON-TYNE.

TOWNSON & MERCER,
89, Bishopsgate Bireet Within,

Wholesale and Export Dealers and Manufa&urers of
PURE CHEMICALS, &c.,
For Analysis and the general Laboratory Use of Manufa®turers
and Professors of Universities, Schools, Mines, &c.
Now ready,
FOWNSON & MERCER’'S COMPLETE CATALOGUE of
Chemical and Scientific Instruments, Pure Chemicals &c. Demy
3vo. . Illustrated with upwards of 8co Woodcuts, Price 2s. 6¢
net tras

Silicates of Soda and Potash in the state or
Soluble glass, orin CONCENTRATED SOLUTION of first
uality, suited for the manufaure of Seap and other purposes
applied on best terms by W., GOSSAGE and Sons, Soap
" arks, Widnes, Lancashire.
London Agents, COSTE aad Co., 19 and 20, Water Lane, Tower
Vreet BN who -13 atnckreadw for delivery.
SULPHUROUS ACID.
SULPHITES AND BISULPHITES OF
SODA AND LIME.

A. BOAKE & CO.
STRATFORD, LONDON, E.