383 
of Edinburgh, Session 1873-74. 
ing with the formula C^IhSCXj, and its mode of formation and 
reaction lead to the constitutional formula — 
(CII 3 ) 2 
Br— S— CH — C00I1 . 
The result of its analysis are as follows : — 
Calculated. 
Obtained. 
C 4 
= 48 ... 
.... 23-9 
23-7 ... 
... 231 
H 9 
=-- 9 ... 
.... 45 
4-5 ... 
... 4-8 
0 a 
= 32 .. 
.... 15*9 
— ... 
... — 
s 
32 .. 
.... 15-9 
— ... 
... 16-1 
B 4 
80 .. 
.... 39-8 
40-0 ... 
... 39-7 
201 
100-0 
It is a very deliquescent body, and has a powerful acid reaction. 
Dimethyl-thetine . — The base, of which the body just described is 
the hydrobromate, is obtained from the latter by the action of oxide 
of silver. It may also be prepared from the sulphate of dimethyl- 
thetine by treatment with carbonate of baryta. It is a very deli- 
quescent crystalline body, containing one molecule of water of 
crystallisation, which it loses if exposed for several days over sul- 
phuric acid in vacuo. 
The numbers calculated for the formula 
c 4 h 8 so 2J h. 2 o = 
(CH 3 ) 2 
II 
S— CH — CO , H 2 0 
agree with those obtained by experiment, thus — 
Calculated in 100. 
Obtained. 
c 
N 
.34-7 
34-0 33-9 
H 
. 7*2 
7*3 7-3 
h 2 o 
. 13*0 
18-0 — 
Hydrochlorate of dimethyl-thetine . — This body may be obtained 
either by saturating a solution of the base with hydrochloric acid, 
or by means of double decomposition between the sulphate of 
