[ i69 ] 



Of the Alteration arifing from Difference of Temperature. 



To difcover this alteration by experiment in each individual in- 

 flance would be an endlefs tafk, hence I have feleded only 3 

 cafes with refped to the vitriolic acid, and 2 of the nitrous, and 

 obferved the changes in each at every 5 degrees above 60° unto 

 temperature 70*^, and at every 5 degrees below 60? unto temperature 

 50^ nearly, thefe being the temperatures at which experiments are? 

 ufually made. 



Of the Vitriolic Acid. 



1,8403 at - 49O 



hence we fee that vitriolic acid, whofe denfity at 60" is 1,8360, 

 lofes by afcenaing and gains by de/cending o,ooc68 for every degree 

 of temperature between 60* and 70* and 0,00043 nearly by each 

 degree between 60? and 49**. 



Vol. VII. Y Again 



