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.