ATOMIC WEIGHTS 471 



chloride were separated after the usual method, and both were estimated. 

 Eig-ht analyses o-ave the followino- weio-hts : 



Hence we have the following percentages, reckoned on the original 

 salt: 



.0024 



Joly ' studied derivatives of iridium trichloride. The salts were dried 

 at 120°, and reduced in hj^drogen. With IrCL.SKCl.SHoO he found as 

 follows : 



Salt. Ir. KCl. 



1.5950 .5881 .0803 



1.6380 .6037 .7000 



2.6276 .9689 1.1231 



These data, if the weight of the salt itself is considered, give discordant 

 results, but the ratio Ir : 3KC1 : : 100 : x is satisfactory. The values of x 

 are as follows: 



115.677 

 115.952 

 115.915 



Mean, 115.848, :r .0583 



Hence Ir = 193.377. 



Compt. Rend., 110, 1131. 1890. 



