( 1748 ) 
Heat, 1 obferved a great many Cubical Salts of feveral 
figures, that were coagulated in the Water, whereas I 
could fee but two fuch Salt particles in the Water that 
was pour'd upon the Tobacco Alhes jaft as the fame came 
out of the Pipe. 
This laft experiment of mine was made in very raoift 
weather, in which the Salt particles did not only coagu- 
late, but they were alfo fo tenacious of their figure, that 
I fcarce ever obferved any Salts extracted from burnt Mat- 
ter fo ftubborn and ftrong as theft. 
I put the Glafsafecond time over the flame of a Candle 
till the Water aftually boyFd, and then viewing it, I faw 
fome Great <Par tides that were very dark, and furround- 
ed with abundance of very fmall Particles, of which I 
could not difcover any figure, no more than of fe- 
veral other fmall Particles, which I lookt upon to be 
Salts. 
Thefe are my Obfervations and Experiments upon 
this fubjeft, which I thought fit to communicate to 
you. 
