—, absorption of acids and basic oxides, [7]

—, action of alum on, [163]

—, — of cu­pram­mon­ium on, [5], [217]

—, — of lime on, [84]

—, — of soda and bisulphite compared, [76]

—, — of sulphur on, [130]

—, — on light, [6]

— and acids, [12]

— and alkalis, [14]

— and barium hydrate, [7]