328 Mr » cavendish’s Obfervations , &c. 
fpecific gravity, at 6o° of heat, was 1,5642, funk the ther- 
mometer G to “-37 0 , the experiment being tried at the fame 
time, and with the fame precautions, as the foregoing. It 
was previoufly found, by adding fnow gradually to lome of 
this acid, as was done by the fpirit of nitre, that it was a little, 
but not much flrongcr than it ought to be, in order to produce 
the greateft effett. 
