APP, N° VII.] EXPERIMENTS ON WHALE-OIL. 



527 



Therefore; As 1.000, the specific gravity of water, is to 

 8.32734, the weight in pounds avoirdupois of a gallon of wa- 

 ter, so is 0.9279, the specific gravity of the oil to 7.72694, or 

 71b. 11 oz. 10.1 drams the weight of a gallon of refined oil at 

 temperature 53\ 



But this oil appeal's to be somewhat heavier than the oil 

 of commerce ; for the following results, derived in a similar 

 way, were obtained from experiments with the common 

 whale-oil. 



Specific gravity, temperature 32°, = 0.9312 



40, = 0.9289 



44, = 0.9268 



60, = 0.9214 



63, = 0.9204 



The change of specific gravity from temperature 32° to 63° 

 is 0.0108, or 0.00035 for every degree of temperature. This 

 proportion applied in a regular ratio gives the specific gravity 

 of oil at every 5 degrees of temperature, from 30 to 70, as 

 follows : 



