“PHYSICAL any LITERARY. “313 
‘edthés 2 medicine ‘much of the fame’ nature 
_ with the preceeding white precipitate. A fo- 
Yution of crade fale amimoniad, ‘atid fpir. “fal. 
mar. have the fame effects on ‘the: olution of 
quick-filver,‘as the muria has,’ o 
“Tra little frefh’ urine is’ ‘put ito a folution 
of quick-filver iti agza fortis, there will like 
_ wife happen a precipitation; but the powder 
is not white, but of a pink or flefhy colour, 
it appears pretty bulky, and has acquired a 
little additional weight. This precipitate is 
not ufually prefcribed by phyficians: but M, 
“Lemery pretends that it is milder than the 
white, and only operates by {tool. 
Ir would appear then, that, in many in- 
_ ftances of precipitation, the particles of the 
_ diffolved body are increafed in denfity and 
_ fpecific gravity ; by reafon that fome parts ei- 
ther of the precipitating matter only, or of 
the compound, made up of the folvent and 
_ precipitant, are very firmly united to them, 
_ fo that they cannot longer be fuftained in the 
liquor. But, in other cafes, where the 
_ matter precipitated has acquired no addition 
_ of weight, no new or remarkable properties, 
and is eafily reducible to the native form ot 
the body diffolved ; there muft be fome o- 
Ror ther 
