BETWEEN THE VISCOSITY OF LIQUIDS AND THEIR CHEMICAL NATURE. 061 
Values of Chlorine. 
Chloride. 
(observed). 
“ Rest ” 
(calculated). 
Cl. 
Propyl. 
294 
206 
88 
Isopropyl . 
290 
198 
92 
Isobutyl . 
364 
278 
86 
Allyl. 
268 
179 
89 
Ethylene. 
326 
160 
(83) 
Methylene. 
243 
80 
(81) 
Chloroform. 
328 
114 
(71) 
Carbon tetrachloride .... 
406 
148 
(64) 
Carbon dichloride. 
497 
201 
(74) 
In monohalogen comjDOunds the value of chlorine by the method of calculation 
adopted is 89, and in carbon tetrachloride is 64, 
It is thus apparent, as far as the data go, that as chlorine accumulates in a 
molecule its value becomes less and less, the values obtained being 
In monochlorides, 89. In trichlorides, 71. 
In dichlorides, 82, In tetrachlorides, 64. 
In the unsaturated compound, C 2 CI 4 ,, chlorine appears to have about the same 
value as in chloroform and in ethylidene chloride (76). 
The mean of the values for iodine and clilorine in monohalogen compounds is 1 53, 
which is almost identical with that obtained for bromine, viz., 151. 
Values of Oxygen, 
Carbonyl Oxygen .—On deducting, as before, from the observed numbers for 
II 
aldehyde and the ketones, values are obtained for O. 
