MESSRS. T. E. THORPE AND J. W. RODGER ON THE RELATIONS 
G 6 2 
II 
C^Hj^O. 
wCHj 
(calculated). 
II 
0. 
i/# (observed). 
Aldehyde . 
169 
160 
+ 9 
Dimethyl ketone. 
238 
240 
— 2 
Methyl ethyl ketone .... 
302 
320 
-18 
Methyl propyl ketone .... 
383 
400 
-17 
Diethyl ketone. 
376 
400 
-24 
Mean adopted value of 0 = — 19. 
Methyl ethyl ketone and methyl propyl ketone give almost the same value for 
carbonyl oxygen; the value of diethyl ketone, on making allowance for the effect of 
II 
constitution, also indicates that the value of 0 is about — 19. 
The values for O obtained from dimethyl ketone, the initial member of the series, 
which from surface-energy measurements appears to contain molecular aggregates, 
and aldehyde, which, of course, has a different constitution from that of the ketones, 
are not included in the adopted mean. 
These two substances will be referred to later. 
It is assumed that the probable value for carbonyl oxygen is 
II 
O = - 19. 
Hydroxjjl Oxygen .—On deducting the values of nCH^ from the observed numbers 
for the fatty acids, the differences obtained correspond with the joint effect of an 
il\/ 
atom of carbonyl and an atom of hydroxyl oxygen 00. 
Acids. 
//# (observed). 
7iCH2 
(calculated). 
' 
!!\/ : 
0 0. 
! 
Formic. 
163 
80 
83 
Acetic. 
237 
160 
77 1 
Propionic. 
324 
240 
84 
Butyric. 
397 
320 
77 
Isobutyric. 
398 
312 
86 1 
i 
!l\/ 
IMeau value of 0 0 = 
= 81. 
