456 SMITHSONIAX MISCELLANEOUS COLLECTIONS VOL. 54 



The reductions to vacuum are neglected by Keiser himself, but are here 

 added in order to secure uniformity witli later results by the same author. 



Bailey and Lamb * made experiments upon several compounds of pal- 

 ladium, but finally settled upon palladiammonium chloride, like Keiser. 

 Two preliminary experiments, however, with potassium palladiochloride 

 are given, in which the salt was reduced in hydrogen, and both Pd and 

 KCl were weighed. The data are as follows, with the ratio (calculated 

 as with Berzelius' experiments) given in a third column: 



Mean, 70.485, ± .0290 



Hence Pd = 105.11. 



The palladiammonium chloride was studied by two methods. First, 

 weighed quantities of the salt were reduced in hydrogen, the ammonium 

 chloride so formed was collected in an absorption apparatus, and then 

 precipitated with silver nitrate. The weights found were as follows, with 

 tl^e Pd(XH3CL,) proportional to 100 parts oF silver chloride given in the 

 third c6lumn : 



± .0742 



Hence Pd = 106.60. Bailey and Lamb regard this as -too high, and 

 suspect loss of N'H4C1 during the operation. 



The second series of data resemble Reiser's. The salt was reduced in 

 hydrogen, and the spongy palladium was weighed in a Sprengel vacuum. 

 The data are as follows : 



f 1.890597 

 '1 1.874175 

 r 1.307076 

 J 1.340045 

 I 1.905536 

 L 1.685582 

 C 1.691028 

 i 2.112530 

 1 2.110653 

 I 1.969100 



^ .0099 



' Journ. Chem. Soc, 61. 745. 1S92. 



