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for some time in distilled water, and were found to have lost 
two and a quarter grains. The solution yielded to sulphu- 
retted hydrogen, a precipitate of sulphuret of antimony equal 
in weight to less than one-half of the loss of the James' pow- 
der. It likewise yielded an abundant precipitate with oxalate 
of ammonia, and when tested with lead and nitrate of silver 
showed slight traces of phosphoric acid. This portion dis- 
solved in water is said by Berzelius, who examined one spe- 
cimen of James' powder, to be antimonite of lime. It would 
appear likewise to contain some soluble superphosphate. 
When the solution is allowed to cool, it becomes hazy at a 
temperature of about 120°, and at about 70° begins to deposit a 
white powder, which, if it rest long, adheres firmly to the glass. 
It can, however, be redissolved by heating the solution, or by 
adding a small quantity of muriatic acid. The deposition, 
however, does not take place if the solution is very much di- 
luted. 
Twenty grains of the James' powder which had been treated 
as above were boiled for some time in pure strong muriatic 
acid, and seven grains remained undissolved. The solution 
was cautiously diluted with water, but contrary to my expec- 
tations no sesquioxide of antimony was thrown down. A 
large quantity of water was then added, and the fluid still re- 
mained perfectly clear. It was then exposed to a brisk cur- 
rent of sulphuretted hydrogen gas, and yielded a copious pre- 
cipitate of sulphuret of antimony, which after being collected 
with the usual precautions, washed and dried, was found to 
weigh two grains. 
The filtered solution was then boiled to expel all traces of 
sulphuretted hydrogen, carefully saturated with ammonia, and 
oxalate of ammonia added, which threw down an abundant 
white precipitate. This was allowed to remain in a warm 
place for twenty-four hours to settle; the oxalate was collected, 
washed, and dried, and was found to weigh thirteen grains. 
From these results it appeared that the composition of 100 
grains of the James' powder was, 
