on the Composition of James’s Powder.. 33$ 
(e) White as cream of milk with phofphorated mineral 
alkali ; the fediment from which mixture did not diflolve in 
a quantity of boiling water that would have difl'olved vitriolated 
lime, nor in vinegar, but was readily taken up by nitrous acid. 
(f) The tranfparency of nitrated and muriated barytes was 
fcarctly difturbed. 
Qr) It turned infufion of turnfole red. 
(£) A little of the deliquefcent fait above mentioned, that 
had beet* difl'olved in alcohol, being made nearly dry, on 
adding to it a mixture of alcohol and acid of vitriol, vapours 
of nitrous ether were detached with ebullition 
(/) With lime-water it produced a flight fediment. 
(*) With Pruffian alkali at firft a pale green colour, and 
afterwards a blue colour was produced t but without any preci- 
pitation on Handing. 
(7) This fubftance, which had been difl'olved in alcohol,, 
was infufible under the blow-pipe ; and after being heated red- 
hot on charcoal it was no longer foluble in water. Being fur- 
ther examined, it was found to be merely calcareous earth. 
This foluble part then in alcohol appeared to be nothing but 
nitrated lime, with fome traces of calcined iron. 
Secondly , The 59 grains of powder, not foluble in alcohol »■ 
were examined. 
(a) A mixture of vitriolic acid and alcohol detached from 
this powder no nitrous ether, nor any vapour that formed 
white clouds with volatile alkali. 
(£) It did not effervefce, and required above zoo times its 
weight of concentrated acetous acid to diflolve it. 
(c) Under the blow-pipe it emitted no fmell or fume, and 
with great difficulty melted imperfectly, affording an irregular 
figured, horn* like, opaque mafs. 
