502 
MESSRS. T. E. THORPE AHD J. W. RODGER ON THE RELATIONS 
Ketones. 
Dimethyl Ketone (Acetone). CH 3 .CO.CH 3 . 
A sample lent to us by Dr. Perkin was distilled : all came over between 55°‘3 and 
55°'5. It w'as redistilled : the portion collected for the observations boiled between 
55°‘49 and 55°'54. n = 8 °, ^ = 25°'5 (emergent column). Bar. 742'6 millims. Cor¬ 
rected and reduced b.p. = 56°*22. 
Vapour density : 
Found, 28‘51. Calculated, 29'00. 
Observations for viscosity gave :— 
Left limb. 
Right limb. 
Temp. 
Press. 
1 
1 
0 
0 
Temp. 
Press. 
CoiT. 
'/• 
7-94 
128-68 
-000078 
•003634 
7-79 
128-61 
•000078 
•003641 
11 71 
128-70 
•000080 
•003497 
11-74 
128-62 
•000080 
•003495 
15-24 
128-72 
-000082 
•003383 
15-24 
128-61 
•000082 
•003370 
19-04 
1-28-85 
-000085 
•003254 
19-01 
128-76 
•000085 
-00326-2 
23-04 
128-84 
-000088 
•003129 
22-99 
128-76 
•000088 
•003132 
27-21 
129-09 
-000091 
•003004 
27-24 
129-05 
•000091 
•003010 
32-31 
128-62 
-000094 
•002861 
32-56 
128-61 
•000094 
•002865 
35-94 
128-51 
-000096 
•002774 
36-06 
128-46 
•000096 
•002770 
40 04 
128-40 
-000099 
-002683 
40-04 
128-34 
•000099 
•002678 
44-09 
128-34 
-000101 
•002586 
44-16 
128-29 
•000102 
•002583 
47 -Gl 
128-30 
-000104 
•002501 
47-64 
1-28-21 
•000104 
•002506 
52-16 
128-18 
•000107 
•002405 
52-24 
128-10 
•000107 
•002406 
53-86 
128-06 
•000108 
-00-2377 
In reducing the observations wm have adopted the value d ( 071 °) = 0‘81858 for the 
density, and the expression 
V = 1 + - 03135293 ^ + -05302426^^ - -0029^3 
for the thermal expansion (Thorpe, loc. cit.). 
Taking 
17 , = •003637 7]^ = ‘002405 (calculated) = ‘002958 
b = 7°‘8G b = 52°‘20 b (fi’oi'i'' curve) = 29°‘00, 
w^e obtain the foianula 
572-63 
~ (209-08 + ’ 
which gives results in very good agreement with those obtained by observation. 
