453 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 54 



In a single analysis of the corresponding bromide, 1.2736 grammes 

 gave 0.3065 of rhodium, or 24.065 per cent. Hence Eh= 102.97. In 

 another experiment, 1.2675 grammes of bromide gave 1.6683 of AgBr. 

 Hence Eh = 103.12. 



Seubert and Kobbe ' determined the atomic weight in the same way, 

 that is, by igniting rhodium pentamine chloride in hydrogen and weigh- 

 ing the residual metal. Their results arc given below : 



Mean, 34.954, ± .0032 



Hence Eh =102.94. 



In the sixth experiment the ammonium chloride formed was collected 

 in a bulb tube, and estimated by weighing as silver chloride. 3.5531 

 grms. of AgCl were obtained. Hence Eh = 103.12. 



Tlie same process was followed by Hiittlinger,' who obtained almost 

 exactlv the same result. His fisfures are as follows : 



0020 



Hence Eh = 102.93. 



Another series, somewhat later, 

 figures, with vacuum weights : 



l)y H. Dittmar,^ gave the subjoined 



1 Liebig's Annalen, 260, 318. 1890. 



- Sitzungsb. phys. med. Soz. Erlangen, 39, 1. 1907. 



' Sitzungsb. phys. med. Soz. Erlangen, 40, 184. 1909. 



/ 



