PHYSICAL AND LITERARY. 417 



a half of (J), to give it the full gun-pow- 

 der colour. Thefe experiments, thougli 

 not fo accurate as thofe made with the 

 balance, y€t<:learly-demonn:rate a remark- 

 able diiFerence of ftrength betwixt the a- 

 bove lime waters, 



III. Twenty grains of fait of tartar 

 being mixed with eight ounces and two 

 drams of the weak lime-water (^), after 

 it had flood five days on the lime, the 

 mixture became immediately white and 

 turbid, and foon precipitated a whit-e 

 powder; which, being feparated from the 

 water by filtration, and dried, weighed 

 2§gr. 



The fame quantity of fait of tartar, 

 mixed with eight ounces and two drams 

 of double lime-water, that had flood 

 eight days on the lime, became confidera- 

 bly thicker and whiter than the former ; 

 and afforded rather more than 7 grains of 

 white powder. 



The fame quantity of fait of tartar be- 

 ing mixed with eight ounces and two 

 drams of the double lime-water (^), which 



had 



