Radio-Active Substances

Transcriber’s Note:

The cover image was created by the transcriber and is placed in the public domain.

PURE RADIUM BROMIDE, when available

PITCHBLENDE and THORIUM NITRATE.

OZONE GENERATOR,

Complete,

With 1 in. spark coil,

£2 17s. 6d.

CROOKES’S HIGH VACUUM TUBES, showing the fluorescence of various minerals. A good selection always in stock, including several specialities.

SPECTRUM TUBES, GLASS BLOWING, “X-RAY” OUTFITS and TUBES, HIGH FREQUENCY APPARATUS and APPLICATORS, and other Scientific Instruments.

Experimental work of any kind in Glass or Metal.

Radium Bromide, Radium-Barium Bromide, Radium-Barium Chloride, in Tubes of various quantities and strengths.

Phosphorescent Zinc Sulphide, 1 grm. and 5 grm. Tubes, and per oz.

Phosphorescent Zinc Sulphide, Screens.

Radium, Active Screens for Photographic effects.

Uranium Platino-cyanide Screens, from 7 × 5 to 15 × 11.

Pitchblende, Selected Radio-Active.

Willemite, Autunite, and other Fluorescent Minerals.

Salts of Uranium, Thorium, Calcium, and other X-Ray Materials.

(Subject to being unsold.)

Chemicals for Scientific Investigation and Laboratory Work.

HARRINGTON BROS.,

4, Oliver’s Yard, City Road, London, E.C.

MANUFACTURING CHEMISTS.

Mdme. SKLODOWSKA CURIE

Thesis presented to the

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