__________________________________________________________________
| | | |
| | A | B |
| | | |
| | Percentage | Percentage | Percentage | Percentage |
| | Taken. | Found. | Taken. | Found. |
|____________________|____________|____________|____________|____________|
| | | | | |
| Antimony Sulphide | 36.47 | 36.25 | 37.34 | 37.22 |
| Potassium Chlorate | 33.25 | 33.71 | 46.03 | 46.43 |
| Mercury Fulminate | 30.27 | 30.02 | 16.61 | 16.34 |
|____________________|____________|____________|____________|____________|

Dr. H.W. Brownsdon's (_Jour. Soc. Chem. Ind._, xxiv., April 1905) process
is as follows:--The cap composition is removed by squeezing the cap with
pliers, while held over a porcelain basin of about 200 c.c. capacity, and
removing the loosened foil and broken composition by means of a pointed
wooden chip. Composition adhering to the shell or foil is loosened by
alcohol, and washed into the dish by means of alcohol in a small wash
bottle. The shell and foil are put to one side and subsequently weighed
when dry. The composition in the dish is broken down quite fine with a
flat-headed glass rod, and the alcohol evaporated on the water bath till
the residue is moist, but not quite dry, 25 c.c. of water are then added,
and the composition well stirred from the bottom. After the addition of
0.5 grm. of pure sodium, thiosulphate, the contents of the dish, is well
stirred for two and a half minutes. One drop of methyl orange is then
added, and the solution titrated with N/20 sulphuric acid, which has been
standardised against weighings of 0.05-0.1 grm. fulminate to which 25 c.c.
of water is added in a porcelain dish, then 0.5 grm. of thiosulphate, and
after stirring for two and a half minutes, titrated with N/20 sulphuric
acid. The small amount of antimony sulphide present does not interfere
with the recognition of the end point. After titration, the solution is
filtered through a small 5-1/2 cm. filter paper, which retains the
antimony sulphide. The filter paper containing the Sb_{2}S_{3} is well
washed and then transferred to a large 6 by 1 test tube. Fi