284 ESSAYS anp OBSERVATIONS 
ART. Xs. 
Remarks on chemical Solutions and Precipita- 
tions, by ANDREW PitumMeER, M. D.; 
Fellow of the Royal College of Phyfictans, 
and Proféeffor of Medicine and Chemiftry in 
the Univerfity of Edinburgh, * 
HAT I may not give the firft inftance 
of breaking in upon the order and 
rules eftablifhed in this fociety, I fhall lay be- 
fore you, at this time, fome mifcellaneous 
obfervations, on the folutions and precipita-. 
tions which frequently occur in the profecu- 
tion of chemical inquiries. 
I fhall lay down thefe remarks by way of 
propofitions, and, after each, fhall mention 
the facts or experiments which gave occafion 
to the remark, or which confirm and illu- 
{trate the propofition. 
_ ALTHOUGH many of the inftances which 
I am to adduce, are common, and well 
known to every one verfant in chemical ex- 
periments; yet, as the hiftory of chemical 
folutions 
* Fanuary 3d 1738. 
