BUNSEN ON THE CACODYL SERIES. Fe les 
12. Basic Chloride of Cacodyl. 
This substance is obtained by heating the protochloride with 
water, or still easier by distilling oxide of cacodyl with hydrous 
muriatic acid. he following experiments were made upon the 
substance prepared by distilling 40 grms. oxide of cacodyl with 
dilute acid, and then distilling the product in a close vessel with 
water and lime powder. ‘This was then dried over chloride of 
calcium, and once more distilled in the distillation tube. 
Analysed by means of chromate of lead, the following results 
were obtained :— 
I. 0°8682 grm. of substance gave 0°553 grm. carbonic acid, 
and 0°3351 grm. water. 
Tl. 07041 grm. of substance gave 0°4377 grm. carbonic acid, 
and 0°2688 grm. water. 
0°6481 grm. burnt with oxide of nickel yielded 08005 erm. 
sulphuret of arsenic. 0°748 grm. of the same yielded again 
2602 grm. sulphate of barytes, and 0°055 grm. melted sul- 
phur. 
0°5419 erm. boiled with nitric acid and nitrate of silver yielded 
0°3997 grm. chloride of silver, and 0:04 grm. metallic silver from 
the filter. 
0°5298 grm. conducted over heated lime in a combustion tube 
yielded 0°407 germ. chloride of silver, and 0:007 silver. The lime 
which was used contained 0°0027 germ. chlorine, as I determined 
by a preliminary examination. 
In order to set aside all doubt as to the composition, I made 
this substance by two other methods. I will call the first a, 
which was prepared by distilling the oxide of cacodyl twice with 
concentrated muriatic acid; and the other 4, which was three 
times distilled with the acid. The following are the results 
obtained by analysing these products :— 
III. 0°679 grm. of substance a gave 0°4387 grm. carbonic 
acid, and 0:2642 orm. water. 
1°3945 grm. of a, oxidized by nitric acid, afforded 1:0247 chlo- 
ride of silver, and 0-006 grm. metallic silver. 
0°7811 grm. of b, heated in the same way, produced 0'578 grm. 
chloride of silver, and 0:0098 grm. metallic silver. 
From these experiments, of which I consider Nos. I. and III. 
the most accurate, the following composition is deduced :— 
VOL. III. PART x. Y 
