86 Journal of the Mitchell Society. [Nov. 



1900, p. 1126, except vapor pressure at 274° C (calculated from 

 Biot's formula) ; and vapor density at 0° C which is theoreti- 

 cal. Molecular weight used, 114.144. For calculation of the 

 latent heat, 



A = antilog (1.1739925 + 0.00104426/) 



+ antilogr (0.2271234 — 0.003802250, 

 where /=/°C-10. 



Isopentane. See Table 5. Data from Proc. Phys. Soc. 1895, 

 p. 602; except vapor density at 0° C which is theoretical. 

 Molecular weight used, 72.10. For calculation of the latent 

 heat we have, 



A = antilog (1.6310169 — 0.00031549/) 



+ antilog- (0.1373762 — 0.00515903/), 

 where / = t° C -f 30. 



Normal Pentane. See Table 6. Data from Jour. Chem. 

 Soc. 21, 1897, p. 446; except vapor density at 0° C which is 

 theoretical. Molecular weight used is 72.10. For calculation 

 of the latent heat, we have, 



A = antilog (1.7496468 — 0.00073363/) 



+ antilog (0.0668185 — 0.00551392/), 

 where / = t° C + 20, 



Normal Hexane. See Table 7. Data from Jour. Chem. 

 Soc. 1895, p. 1071; except vapor density at 0° C which is 

 theoretical. Molecular weight used is 86.11. For calculat- 

 ing the latent heat, we have, 



A = antilog (1.3604438 + 0.00042355/) 



+ antilog (0.2029359 — 0.00411255/), 

 where / = t° C + 10. 



Normal Heptane. See Table 8. Data from Jour. Chem. 

 Soc. 74, 1898; except vapor density at 0° C which is theoreti- 

 cal, and vapor pressure at 266° and 266.5° C which is calcu- 



