332 Dr. Pearson's Experiments and Observations 
and phofphorie acid; a little phofphoric acid in a free ftate £ 
and a froall proportion of calx of antimony and of iron. 
Ninety grains of the dry part of the above mafs of 129 
grains, p 329. were repeatedly triturated' and digefted m alco- 
hol till aim oft nothing was taken up by it. This folution r 
being filtered, was evaporated to drynefs, and afforded 20 
grains and a half of a fine white fait, very bitter, which, on 
expofure to the air, foon became liquid, but very turbid. 
The powder that had thus ceafed to yield any thing further 
to alcohol was repeatedly triturated and boiled in pure water,, 
till the liquid pafl’ed taftelefs through the filter ; and the filtered 
liquors, being evaporated, left eight grains more of a lefs bitter 
and lefs deliquefeent fubftance than that from alcohol. Part 
only of thefe eight grains was foluble readily in water; and 
they appeared to be a mixture of the faline matter diffolved in 
alcohol, and of the infoluble refiduum in that menftruum. 
The powder remaining on the filter after theft foliations in 
alcohol and water being dried, weighed nearly 59 grains. It 
was white and taftelefs, 
X next examined theft products more particularly; and firjl 
the twenty grains and a half which had been diffolved in 
alcohol. 
( a ) With a large proportion of water it produced' a rather 
turbid appearance, and, after Handing, afediment of calcareous 
earth was depofited. 
{bj This daft folution (y) being filtered, with mild alkalies 
grew very thick, and depofited a. ftdiment that was readily 
taken up by acetous acid. 
(c) With cauftic volatile alkali its tranfparency was ftarcely 
eljfturbed. 
(^) With acid of fugar it became thick and white ; and 
(*•) Whiter 
