I^HYSICALand literary. 42^ 



by s6 grains : (c) Exceeds it by 77 grains^ 

 and {d) by 137 grains. 



The fpecific gravity therefore of the 

 weak lime-water (b) is to that of foun- 

 tain water nearly as 704 to 703. The 

 fpecific gravity of the fingle lime-wa- 

 ter (c) is to that of common water, near- 

 ly as 329 to 328 ; and the double lime- 

 Water (d) is in fpecific gravity to water 

 nearly as iS6 to 185. 



It is obfervable that the fpecific gra- 

 vities of the lingle and double lime waters 

 (c) and (^), are confiderably lefs than the 

 fpecific gravities of the fingle and double 

 lime-v;raters (^) A., and B. mentioned, 

 p. 39. and 40. of my EfTay on the virtues 

 of lime-water, Sec. But, if it be confider- 

 ed, that, in making the latter, a much 

 lefs proportion of water was added to the 

 quick-lime, than in making the former ; 

 it will appear that this difference of their 

 fpecific gravities does not infer any thing 

 againft the accuracy of the hydroftatic 

 balance ; but clearly Ihews, that the 

 ttrength of lime- water varies according to 



Vol. I. Hhh the 



