TABLES 84-87. 



COMPRESSIBILITY OF CASES." 



These tables give the relative values of the product pv for different pressures and temperatures, and hence show the 

 departure from Boyle's law. The pressures are in metres of mercury, or in atmospheres, the volume being 

 arbitrary. The temperatures are in centigrade degrees. 



TABLE 84. Nitrogen. 



TABLE 85. Hydrogen. 



TABLE 86. - Methane. 



TABLE 87. - Ethylene. 



* Tables 84-89 are from the experiments of Aciagat; " Ann. de chim. et de phys.," 1881, or " Wied. Bieb.," 1881, 

 p. 418. 



SMITHSONIAN TABLES. 



79 



