io8 



Table 44 



VOLUME OF A CLASS VESSEL FROM THE WEIGHT OF ITS EQUIVALENT 

 VOLUME OF MERCURY OR WATER 



If a glass vessel contains at PC, P grammes of mercury, weighed with brass weights in air at 

 760 mm pressure, then its volume in ccm 



at the same temperature, /, : V= PR = P^> 

 at another temperature, t x , : V = PR\ — Pp/d j 1 + 7 (t\ - t) j 

 p = the weight, reduced to vacuum, of the mass of .mercury or water which, weighed with brass 



weights, equals 1 gram ; 

 d = the density of mercury or water at t°C, 

 and 7 = 0.000 025, is the cubical expansion coefficient of glass. 



Taken from Landolt, Bbrnstein, and Meyerhoffer's Physikalisch-Chemische Tabellen. 

 Smithsonian Tables. 



