Ee 5a | 
at leaft 2.of the quantity requifite to faturate them, And hence 
bleachers fhould not ufe boiling water to extract the faline fub- 
{tance of barilha, for, the alkaline part being in a cauftic ftate 
diffolves part. of the coaly matter with which. it, is;wnited, which 
fullies the folution, gives ita dark. hue, and afterwards is 
depofited, on the linen, and cannot be feparated by acids. 
f 
See eT AO: oN uo) 
Or Dantzic PEARL ASH. 
Tus falt was alfo fent to me by Mr. Byrne. It is exceeding 
white, and if not expofed to the air, very hard, and poffefles an 
alkaline tafte. ‘ 
THE quantity of fixed air and earth contained in different 
parcels of this fubftance is variable ; in fome ounces I found the 
quantity of fixed air to amount to 100 grains, in others to 1153 
and therefore at a medium it may be rated at 107,5 prains, or 
1290 grains, in one pound troy. The earth remaining after the 
folution of one pound amounted to 20 grains. 
ONE ounce., He this. fabflance gradually ] rete to seat ee and 
kept i in that heat for thr ee quarters of an hour, loft 7° grains. of i its 
weight; and being then diflolved in Apirit, of falt, Joft tried grains ; 
therefore the quantity of moifture i in one ounce of this, fubftance 
was 7010755 -72= 34, 5 grains, or 4t4 in one pound. 
MOrIroda AGAIN, 
i 
