1904] Mills — Molecular Attraction. 87 



lated from Biot's formula. The molecular weight used is 

 100.13. For calculation of the latent heat, we have. 



A = antilog- (1.3407071 + 0.00053408/) 



+ antilog- (0.2342860 — 0.00403623/), 

 where t=t° C. 



Normal Octane. See Table 9. Data from Jour. Chem. 

 Soc. 1900, p. 1145; except vapor density at 0° C which is the- 

 oretical. The molecular weight used is 114.144. For calcu- 

 lation of the latent heat, we have, 



A = antilog (1.3927781 + 0.000342913/) 



+ antilog (0.2497609 — 0.004006534/), 

 where /=/° C— 10. 



Benzene. See Table 10. Data from Jour. Chem. Soc. 

 1889, p. 486, and 1891, p. 125; except density of vapor at 0° C 

 which is theoretical. Molecular weight used is 78.05. Latent 

 heats were calculated by Tsuruta (Phys. Rev., 1900, p. 116), 

 except at 0° C, where the value found by Griffiths and Mar- 

 shall is used, and at 280° C where the calculation was made 

 by the author. 



Hexamethylene. See Table 11. Data from Jour. Chem. 

 Soc. 1899, p. 873; except vapor density at 0° C which is theo- 

 retical. Molecular weight used is 84.096. For calculation of 

 the latent heat, we have, 



A = antilog (1.2956115 + 0.00049715/) 



+ antilog (0.1878242 — 0.00391252/), 

 where / = /° C. 



Fluo-benzene. See Table 12. Data from Jour. Chem. Soc. 

 1889, p. 486, and 1891, p, 125; except the vapor density at 0° 

 C which was calculated. Molecular weight used is 96.09. 

 For calculation of the latent heat, we have, 



A = antilog (1.13157974 + 0.000942654/) 



+ antilog (0.2224140 — 0.00363024/), 

 where / = /° C. 



