22 4 Mr. Lane’s Experiments on 
That I might be better informed of the above, the experi- 
ments were repeated both by fire and lixivium, with greater 
accuracy, as follows. 
Fourteen fpecimens were felefled, fome of which were 
parts of the fame calculus, and others different calculi. 
In the experiments by fire I was favoured with the afiiftance 
of Mr. Stanesby Alchorne, of the Tower, to whom were 
lent ten grains of each, in feparate papers, which were num- 
bered. 
The contents of each paper were placed in feparate cupels, 
under a muffle, the fame as is ufed by him for allaying gold 
and fiver. The fire was raifed gradually, till the furnace was 
fully heated : the time from raifing the fire to the taking them 
out again was three hours, when it was concluded, that what- 
ever volatile matter they contained was expelled. 
The fame quantity as above, of each fpecimen, being put 
into feparate numbered phials, with one ounce meafure of the 
lixivium in each, continued forty-eight hours ; the phials were 
frequently fhaken to forward the folution. 
The clear liquor of each phial was decanted into frefh phials, 
and a quarter of an ounce more lixivium was added to fuch as 
were undilfolved ; after twenty-four hours they were poured out 
of the phials into feparate filtering papers, each numbered, and 
the phials waffled with diftilled water, which was alfo poured 
into the papers, fo that all that remained undilfolved might be 
detained by the papers, which with their contents were care- 
fully dried. 
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