BETWEEN THE VISCOSITY OF LIQUIDS AND THEIR CHEMICAL NATURE. 697 
Homologues (continued). 
t'. Difference. 
Isopropyl chloride. 
Isobutyl chloride. 
Methylene chloride. 
Ethylene chloride. 
0 
21-4 
50-2 
37-1 
93-7 
1 
! 
28-8 
56-6 
Methyl sulphide. 
5'7 
(19-8) 
Ethyl sulphide. 
4.5-2 
Dimethyl ketone. 
17-8 
(16-3) 
Diethyl ketone. 
50-5 
Methyl ethyl ketone. 
43-7 
12-8 
Methyl propyl ketone. 
50-5 
Formic acid. 
1387 
-15-8 
Acetic acid. 
122-9 
- 6-2 
Propionic acid. 
116-7 
21-6 
Butyric acid. 
1.38-3 
Acetic anhydride. 
99-8 
(7-1) 
Propionic anhydride. 
114-0 
Benzene . 
75-9 
- 8-1 
Toluene. 
67-8 
10-1 
Ethyl benzene. 
77-9 
From the above table it is seen that for most series an increment of CHg brings 
about an increase in the temperature of slope, which varies within moderate limits on 
passing from one series to another. The dibromides, the acids, and benzene give, 
however, negative differences, and the dichlorides a large positive difference. These 
irregularities are but further indications of the peculiarities which have already been 
noted in connection with these substances. 
4 u 
MDCCCXCIY.—A. 
