for meajuring the Specific Gravity of Bodies. 395 



third figure, when the fame piece of metal is 

 melted and cooled a fecond time. This dif- 

 ference probably arifes from the arrangement 

 of the parts in cooling more or lefs fuddeniy. 



The load was found by experiment 955 : ioef>in«. 



A piece of caft lead required the additional 1 



weight {210 : g^ 



DifFerence is ahfolute weight in air 788 : 2c 



Additional weight when the lead was in "1 



the lower fcale f 280 : 09 



Difference between the two additional 7 



weights or lofs by immerfion \ ^9 '• 2\ 



. 788-25 11384. 

 Hence fpecific gravity , 



69.24 1000 



When the inftrument is once adjufled in dif- 



tilled water, common water may be afterwards 



ufed. For the ratio of the fpecific gravity of 



the water made ufe of to that of diftilled water 



b 



being known (=-), and the ratio of the fpecific 



a ' 



gravity of the folid to the water made ufe of 



c 

 being alfo known {=-). the ratio of the fpecific 



gravity of the folid to that of diftilled water 



•11 t , ^^ 



Will be compounded of both (that is, — .) 



'ab 

 There is reafon to conclude from the experi- 

 ments of various authors, that they have not 

 paid much attention either to the temperature 

 or fpecific gravity of the water they made ufe 



of. 



