466 



SMITHSONIAN A[ISCELLANEOUS COLLECTIONS 



VOL. 54 



Hence Pd = 106.70. 

 Bromide. 

 .54402 

 .80237 

 .91601 

 .42942 

 .76884 

 .62795 



Pd. 

 .19286 

 .28468 

 .32509 

 .15288 

 .27271 

 .22270 



Mean, 35.495, ± .0011 



Per cent. Pd. 

 35.450 

 35.479 

 35.489 

 35.461 

 35.470 

 35.464 



Mean, 35.469, ni .0038 



Hence Pd = 106.58. 



The four series of analyses of the bromide now combine thus : 



Haas 35.492, ± .0006 



Gebhardt 35.491, ± .0007 



Gutbier, Haas and Gebhardt 35.495, ± .0011 



Gutbier, Haas and Gebhardt 35.469, ± .0038 



General mean 35.491, ± .00042 



The influence of the determinations rejected by Gutbier is insignificant. 

 Nine ratios are now available from which to compute the atomic 

 weight of palladium, as follows: 



(1). 2KCl:Pd: : 100: 70.865, ± .0150 

 (2). 2AgCl:Pd(NH3Cl),: :100:73.813, ±: .0388 

 (3). Pd(NH3Cl)2:Pd::100:50.3882, ± .0005 

 (4). Pd (NH3Br)„:Pd:: 100: 35.491, ± .00042 

 (5). Pd(NH3CN),:Pd: : 100: 55.291, ± .0025 

 (6). Pd (CaH,.NH,Cl),:Pd:: 100: 29.390, ± .0029 

 (7). Pd(C,,H„:NH,Br)2:Pd: : 100: 23.622, ± .0023 

 (8). (NH4),PdBr4:Pd: : 100: 23.1135, ± .0018 

 (9). Pd(NH3Cl)o:PdS: :100:65.651, ± .0051 



To reduce these ratios we have- 



Ag =107.880, ± .00029 

 CI = 35.4584, ± .0002 

 Br = 79.9197, ± .0003 

 K = 39.0999, ± .0002 



C =12.0038, ± .0002 



N =14.0101, ± .0001 



S = 32.0667, ± .00075 



H = 1.00779, ±: .00001 



