THE CHEMICAL NEWS, JULY 23, 1915

THE

CHEMICAL NEWS

AND

JOURNAL OF PHYSICAL SCIENCE.

WITH WHICH IS INCORPORATED THE "CHEMICAL GAZETTE."

Journal of Bractical Chemistry

IN ALL ITS APPLICATIONS TO

PHARMACY, ARTS, AND MANUFACTURES.

EDITED BY

SIR WILLIAM CROOKES, O.M., D.Sc., F.R.S., &c.

VOLUME CXI.-1915.

LONDON:

PUBLISHED AT THE OFFICE, 16, NEWCASTLE STREET, FARRINGDON ST.,

E.C.

AND SOLD BY ALL BOOKSELLERS.

MDCCCCXV.

SUPPLEMENT TO THE CHEMICAL NEWS,

JULY 23, 1915.

Electrodes sealed into

Quartz Glass Apparatus

Transparent Quartz Glass Apparatus of all descriptions.

Particulars can be had on

application to—

The Silica Syndicate, Ltd.,
82, Hatton Garden, London,
E.C.

Telephone-Holborn 6380. Telegrams-" Silexate, London.'

STEREO-PYROMETER

(English Patent 10617/1905). For ascertaining any temperature from 550° C. to 2000°.
Works like a limit gauge, pass or reject. Costs little to buy.
Gives the Hardener a Confidence that is founded on faot.
Makes the Hardening Shop as precise as the Tool Room.

No Delicate Mechanism to get out of Order.
Used like a Stereoscope (for Direct Observation only).

This is undoubtedly the simplest and most reliable form of Pyrometer for practical use in works. It can be used for ascertaining the temperature of :—

Price complete 48s. net.

Write for Descriptive Circular from the Sole Makers

F. E. BECKER & CO., 17-27, HATTON WALL,

E.C.