on the Cmpojition of James's Powder,. 337 
gentle heat till there remained about two ounce-meafures of a 
very turbid liquor. After {landing in ajar two days, it depo- 
sed a clofe white fediment, obvioufly much lefs in bulk than 
the powder added to this menflruum 1 and neany one ounce 
meafure and three quarters of clear yellow liquid were drawn 
off, by means of a fiphon, which was marked N 1. 
The diftilled liquid, which was merely diluted marine acid* 
was poured back on the fediment and remaining liquid ; and 
after digeftion twenty-four hours, this mixture was diftilled as 
before, till there remained about one and a half ounce- mea- 
fure ; but after {landing in ajar feveral days, the quantity of 
fediment depofited was apparently as great as before the fecond 
application of this menftruum, The clear liquor was drawn 
off as before, and marked N° 2. The diftilled liquor being 
found to be merely diluted marine acid, was poured on the 
remaining liquid and fediment a third time ; and, after di- 
geftion, the diftillation was repeated as before. The remain- 
ing liquid having ftood upon the fediment fome time, one 
ounce-meafure of clear liquor was drawn off, and marked N 
3. The fediment did not appear diminiflied by this third dif- 
tillation ; but, as the decanted liquid, N° 3. was found to 
contain a fmall quantity of fome fubftance diffolved or fuf- 
pended in it, the marine acid diftilled in this experiment was 
poured a fourth time on this refiduum, and after digeftion 
boiled. Having flood feveral days, the clear liquor was de- 
canted, and marked N° 4. To the refiduum, after thefe four 
affufions of marine acid, one ounce of boiling diftilled water 
was added, and this mixture was poured on a filter. The pow- 
der upon the filter being well dried, was found to weigh 60,1 
grains. 
Von. LXXXI. Y y la 
