340 
DR. A. DUPRE ON THE SPECIFIC HEAT AND OTHER 
Table VII. 
Per cent, of 
methylic alcohol, 
by weight. 
Volume at 
10° C. 
Volume at 
20° C., found. 
Volume at 
20° C., calculated. 
Difference. 
0 
100 
100-154 
10 
100 
100-252 
100-293 
-0-041 
20 
100 
100-410 
100-429 
-0-019 
30 
100 
100-571 
100-562 
+ 0-009 
40 
100 
100-718 
100-689 
+ 0-029 
50 
100 
100-853 
100-809 
+ 0-044 
60 
100 
100-932 
100-922 
+ 0-010 
70 
100 
101-019 
101-028 
-0-009 
80 
100 
101-101 
101-124 
-0-023 
90 
100 
101-173 
101-212 
-0-039 
100 
100 
101-290 
Table VIII. 
1. 
Per cent., by weight, 
of absolute methylic 
alcohol. 
9 
Volumes of 
water. 
o 
O. 
Volumes of 
methylic 
alcohol. 
4. I 5 . 
Combined volumes. 
6. 
Contraction. | 
Before 
mixture. 
After 
mixture. 
10 
88-793 
12-121 
100-914 
100 
•914 
20 
78-003 
23-985 
101-962 
95 
1-962 
30 
67-373 
35-475 
102-848 
99 
2-848 
40 
56-852 
46-566 
103-418 
99 
3-418 
50 
46-507 
57-139 
103-646 
99 
3-646 
60 
36-428 
67-135 
103-563 
99 
3-563 
70 
26-687 
76-505 
103-192 
99 
3-192 
80 
17*322 
85-139 
102-460 
99 
2-460 
90 
8-408 
92-967 
101-374 
99 
1-374 
Section VI. — Compressibility. 
Table IX. gives the compressibility of the various mixtures for the pressure of one 
atmosphere. 
The numbers in column 5 are calculated on the assumption that the compressibility 
of a mixture is proportional to the volumes of its constituents. To the compressibilities 
found directly, 0 - 0000G2 is always added as a correction for the compressibility of the 
piezometre. 
