254 



TABLE 290. 

 PROPERTIES OF STEAM, 



Metric Measure. 



The temperature Centigrade and the absolute temperature in degrees Centigrade, together with other data for steam 

 or water vapor stated in the headings of the columns, are here given. The quantities of heat are in therms or calo- 

 ries according as the gram or the kilogram is taken as the unit of mass. 



* Where A is the reciprocal of the mechanical equivalent of the thermal unit. 



_ff- 



= internal-work pressure 



Whefe v ^ taken ^ lhres the Ufe ig ^ yen per squflre 



v mechanical equivalent of heat 



decimetre, and where v is taken in cubic metres the pressure is given per square metre, the mechanical equivalent 

 being tliat of the therm and the kilogram-degree or calorie respectively. 

 SMITHSONIAN TABLES. 



