CONTENTS VU 



X. A Revision of the Atomic Weight of Chromium; The Analysis of Silver 



DiCHROMATE. By G. P. BAXTER AND R. H. JeSSE, Jr. 



Introduction iSS 



Purification of Materials 156 



Preparation of Silver Bichromate 157 



Drying of Silver Dichromate 158 



Determination of Silver in Silver Dichromate 158 



Determination of Moisture and Nitric Acid in Dried Silver Dichromate 159 



Specific Gravity of Silver Dichromate 161 



Discussion of Results 163 



XI. The Revision of the Atomic Weight of Phosphorus; The Analysis of Silver 



Phosphate. By G. P. Baxter and Grinnell Jones. 



Introduction 167 



Purification of Materials 169 



Preparation of Trisilver Phosphate 171 



Drying of Silver Phosphate 176 



Determination of Silver in Silver Phosphate 177 



Insoluble Residue 178 



Determination of Moisture in Dried Silver Phosphate 181 



Specific Gravity of Silver Phosphate 182 



Adsorption of Air by Silver Phosphate 183 



Ratio of Silver Bromide to Silver Phosphate 184 



Discussion of Results 184 



Summary 185 



