(1) The solubilities of lead thiocyanate and cadmium thiocyanate were determined by the potentiometric method. (2) The solubilities of zinc thiocyanate and cobalt thiocyanate were determined by the measurements of the specific conductances.
1. Sorption of ammonia by dehydrated materials of chalcedonies, opal, diatomaceous earth, natural silica gels and siliceous sinter have been measured. 2. All these substances sorb considerable amounts of ammonia at ordinary temperature. 3. The sorption velocity can be expressed by the equation x=Klogt+k, where x is the sorption amount at time t, and K and k are the constants.