
The SciencesMay 16, 1908
Green Ammonio-Citrate of Iron for Preparing Blue-Print Paper

Green Ammonio-Citrate of Iron for Preparing Blue-Print Paper

The Preparation of Gold Trichloride for Photographic Purposes

Reclaiming Silver from Photographic Solutions

Notes on Preparing Sodium Sulphite

Notes on Recharging Oxygen Gas Tanks

Apparatus for Preserving Pyrogallic Acid Solutions