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This furnace has been designed more especially for the combustion of carbon in iron and steel analyses, but it is quite suitable for ordinary organic work. The furnace is so constructed that four combustions may be done at one time.

The tubes are enclosed in
a cylindrical fireclay muffle,

thus ensuring uniformity of
heating and obviating any risk of

fracture.
Furnace complete with Burner, Chimney

and Muffle,
23
E3 12 6

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The “ INCANDANODE” TUBE

(50 called because it works all day with the Anode RED HOT). This Tube ran from 9 a.m. to 6 p.m. for five days at the Leicester meeting of the B. M. A. last July. The Anode was incandescent the whole time, but the Vacuum was fully maintained. One Tube will last for years. The Vacuum is easily adjustable. THE BELOT SHIELD FOR X-RAY

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Will work on direct or alternating circuits from 50-250 volts without interposing any resistance.

Current adjusted by rack and pinion movement, giving perfect regulation with any tube. No expensive platinum parts to replace. Price

£3 : 10 : 0

Illustration shows the Tube in the Shield.

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MICROSCOPES.

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15 о о

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36 10 0 The above are fitted with the beautiful Watson-Conrady

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scientific work. They are up-to-date and of highest quality. Tripod, with Altazimuth Head

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...

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A WEEKLY ILLUSTRATED JOURNAL OF SCIENCE

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Of Nature trusts the mind which builds for aye."—WORDS WORTH.

INDEX N U MB E R.

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