and
Other Preparations and Minerals.
=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._
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