42. C. M. Warren on Sulphur in Organic Compounds. 
calcium tube, and the a acid in Liebig’s potash bulbs 
with a mulder tube attac 
After the close of the eiabonticis when the tube shall have 
sufficiently cooled it is carefully removed from the furnace, the 
mixture of peroxyd of lead and rt cautiously drawn out 
into a beaker glass, by means of a bent 
wire, and the tube then inverted within R 
another tube, ee, closed at one end, as shown 
in fig. 2. The mixture of peroxyd of lead 
and asbestus contained in the beaker glass is 
now treated with a strong solution of bi-car- 
nate of soda, and left to stand for about 
twenty-four hours, with frequent shaking.’ 
Solution of bi-carbonate of soda is also 
ured into the tube ee until the level of the 
liquid shall have reached a point, f, on the 
combustion-tube, a little above that which 
was occupied by the plug c, and this is also 
left to stand as the other. After the lapse of 
sufficient time for the reaction to be com- 
pleted, the solution is filtered from the sib: 
tus mixture, including also the solution in 
the tube ¢e, and not omitting to carefully — 
rinse out the anterior portion of the combus- [ee 
tion-tube. The asbestus mixture upon the 
filter is then thoroughly washed, the filtrate concentrated by 
_—— and the sulphuric acid precipitated with chlorid of 
The following results of analyses of te * carbon in- 
dicate the degree of accuracy afforded by this pro 
The preparation employed was commercial - bi- aug of car- 
bon, which was first subjected to re-distillation. 
ype 1. 0:1414 gram of bi-sulphid of carbon gave 0° ee 
of carbonie acid, and 0°8592 of fuiobate of baryta. 
Calculated. Found. 
arbon, Cc 6 15°79 15°61 
Sulphur, 8, 32 84°21 83°70 
100°00. 99°31 
Analysis 2. 0-274 gram of the same subst 0°158 of 
Shoe ae acid, and 1-6768 of sulphate of a as 
Calculated. Found. 
Carbon, Cc 6 15°79 15°73 
Sul phur, Se 82 84-21 84°05 
100-00 99°78 
* H. Rose, Chimie Analytique, new French edition, p, 662. 
