[ 20 ] 
I fhall relate only one. To 654,5 grs. of the folution of the 
vegetable alkali which contained 218,16 of mild alkali, [ added oil 
of vitriol, whofe {pecific gravity was 1,5045, and confequently con- 
tained 54 per cent. ftandard, and of this I found that 270 grs. 
were requifite to faturate the alkali, with a fmall excefs of acid 
as ufual. The air difengaged amounted to 61,8 grs. confe- 
quently the quantity of pure alkali was 156 grs. the quantity 
of ftandard in that of the oil of vitriol employed - was 
145,8 grs. and if 156 of alkali take 145,8 of vitriolic ftandard, 
too of the alkali fhould take 93 ftandard. 
As this fubje& is intimately connected with many others of 
great importance, fuch as the analyfis of mineral waters, the 
theory of dying, the caufes of cryftallization, deliquefcence, refri- 
gerating powers, and folubility of neutral falts, both in water, 
and fpirit of wine, I fhall fubjoin the different refults of the few 
chemifts that have attended to this obje@, with fome remarks 
to enable the chemical reader to ‘form his judgment there- 
upon. 
AccorDINnG to Mr. Bergman, too parts tartar vitriolate con- 
fift of 52 pure alkali, 40 acid and 8 of water. At this rate 
100 parts pure vegetable alkali take up about 77 of the ftrongeft 
vitriolic acid, yet he elfewhere fays they take up 78,5. How he 
difcovered fo large a portion of water in the cryftallized falt I 
cannot conjecture; Mr. Wenzel found that 240 grs. of it loft 
but one in a red heat. Hence 100 parts pure vegetable alkali 
fhould afford above 192 of tartar vitriolate. 
Me. 
