G12 MESSRS. T. E. THORPE AND J. W. RODGKR ON THE RELATIONS 
Molecular viscosity work {t) x specific molecular volume = 17#) in ergs X 10 ^ 
AT THE BOIIJNG-POINT. 
(17 in dynes per sq. centiin. X specific molecular volume in cub. centims. X 10^.) 
Homologues. 
rjd?. 
Difference. 
Pentane . 
235 
50 
Hexane. 
00 
38 
1 Heptane. 
323 
46 
Octane. 
369 
Isopentane . 
240 
46 
Isohexane . 
286 
35 
Isoheptane . 
321 
Isoprene . 
195 
47 
Diallyl. 
242 
Methyl iodide. 
256 
62 
Ethyl iodide. 
318 
59 
Propyl iodide. 
377 
Isopropyl iodide. 
1 
389 
46 
Isohntyl iodide. 
435 
Ethyl bromide. 
255 
60 
Propyl bromide. 
315 
Isopropyl bromide. 
326 
50 
Isobntyl bromide. 
376 
Ethylene bromide. 
501 
32 
Propylene bromide. 
533 
Isopropyl chloride. 
258 
60 
Isobutyl chloride. 
010 
Methylene chloride. 
236 
114 
Ethylene chloride. 
350 
