BUNSEN ON THE CACODYL SERIES. 
Mercurial column above the level of the cistern 
Temperature 
Tension of steam at his) rete ature 
Volume of gas after absorption of the carbonic aid 
Barometer . : - 
Mercurial column above the evel of the cistern 
Temperature 
° . . . 
299 
0°2435 
20° C. 
0017 
68°6 
0°7444 
0°3688 
20° C. 
The relation of the Se ees acid to the azote in this second 
experiment is therefore as 6 : 1:035. 
A third experiment afforded the following results 
Volume of gas at commencement . 
Barometer f , f 
Mercurial column abeve she? leved of the eshte A 
Temperature : 
Tension of steam at this suiepennuene 
Volume of gas after absorption of the carbonic acid 
Barometer A . 4 
Mercurial column iibive the level of the aiseistn - 
Temperature 
The relation in this Expenmiene is therefore as 6: 
557°7 
0°7489 
0°1637 
19%5 C. 
0°0165 
115°7 
07489 
0°3471 
19%5 C. 
re 027. 
0°368 grm. of the substance was heated with oxide of nickel 
to determine the arsenic, and 0°460 grm. of sulphuret of arsenic 
was obtained. 0°433 grm. of the same, heated with nitric acid, 
&e., yielded 1°7121 sulphate of barytes. These results collected, 
are as follows :— 
I. II. Calculated. 
Carbon... C, 28°29 QT -72 27°79 
Hydrogen . H, 4°57 4°66 4°53 
mmote ... pic 11°10 11°01 10°74 
Arsenic. . . As, 56°04 56°81 56°96 
100°00 10000 100:00 
: 
can be estimated with greater ease than any of the 
And this composition corresponds with the formula Kd Cy. 
The specific gravity of the vapour of the cyanide of cacodyl 
other com- 
pounds, as it is much more volatile and more difficult to decom- 
pose. The following are the details of the experime 
nt :— 
Weight of the substance. . + 01795 grm. 
Volume of the vapour : - 53°11 C.C. 
Temperature , 152°C. 
Barometer ... oak a lt 324 lines. 
Pressure to be Re et Ne Ee ari 
» Gy 
