'Mr. 'W edgwood’s Analyfs of a 
has bee,, dilated with eight or nine times its me.fi.re of water, 
there is nothing left in it that alkali can precipitate. 
From the manner in which the folnt.on ,s neceffarily pie- 
pared, it cannot but contain a great redundance of acid ; for 
the fmall quantity of acid, fnfficieut for holding the foluble 
part fufpended, would be foaked op or entangled by the undif- 
folved part, ffo as fiercely to admit of any being poured off, and 
it cannot be diluted, or walh.d out, but by the ftrong and 
itfelf. The folution with which the above experiment was 
made was reckoned to have only about fix grams of the foluble 
matter ,0 three ounces of fpirit of fall, having been prepared 
by digefting that quantity of the fpi.it by half an ounce at a 
time on thirty grains of the crude mineral. 
A Saturated folution was obtained by dige nig, m a 
portion of the Motions thus prepared, the 
down by water from the larger portions till the acid would 
take up no more. A folution, thus faturated, cannot bear the 
tolled quantity of water, a Ragle drop, on the full contact, 
producing a milky circle round it. 
zxam im t m of the above fubfance, extraM from lb, mineral b, 
marine acid, and precipitated by water . 
This fubftance, wafhed and dried, is indiffoluble in 
s indeed might be expected from the manner of its pr.pa- 
" Nor is it afled upon by the nitrous or vitrKdic^^nDC®- 
:,ated or diluted, colder hot; nor by alkaline foluttons, 
, r rauftic, of the volatile or fixed kin . . , . 
ut iw by ftrong if **- •*. ** £ 
afliftance of nearly the ° From , Ms folution it is 
for its extradion from the min nreC imtated 
I 
