Sees sa ee hb ad ast 
TF aye ee ee ee Oe 
ee ce Or ae oe, ee ae ae 
S. P. Sadtler on Iridium Compounds. 341 
trary to my expectations, not the ethylen salts pure and alone, 
but there was a simultaneous formation of what appear to be 
n e-salt 
lated tolerably pure, yet, in the majority of the analyses, I had to 
0 wi i ifficult to separate even under the lens. The 
Teadiness with which these compounds decompose when sub- 
Jected to recrystallization, even although one observes the pre- 
caution of keeping the solution distinctly acid, eine any 
Successful purifying that way. The preparation, t 
pre 
and then over H,SO, or at 100°, according as I wish 
sisted of 
three Cl determinations 42°13 pr. ct., 42°07 
pr. ct. Cl, showing them to be simple IrCl, 
the percentage of Cl is 42°08 pr. ct. nus 
I next got a crystallization of fine, rea rage monoclinic 
crystals of a reddish-brown color, which I think the analyses, 
although not perfectly conclusive, still go to show to be a new 
