336 
DE. A. DUPEE ON THE SPECIFIC HEAT AND OTHEE 
Table III. 
Water value of calorimeter 8*664 grrns. 
Water value of immersed part of thermometer and stirrer 2*024 gnus. 
Water value of annular brass vessel 5 '36 2 grins. 
W ater contained in calorimeter 4156*666 grins. 
Quantities taken of 
Per cent., by 
weight, of 
alcohol in 
mixture 
produced. 
Temperature of 
calorimeter at 
Loss by 
Corrected 
Units of 
heat evolved 
Mean. 
Methylic 
alcohol. 
Water. 
Beginning. 
End. 
radiation. 
rise. 
by 5 grms. of 
the mixture. 
7*850 
70*650 
10 
19*655 
19*930 
0*000 
•275 
21*896' 
l 
20*930 
5*984 
53*856 
10 
19*179 
19*353 
0*020 
•194 
19*965 
r 
12*428 
49*712 
20 
16*204 
16*560 
0*004 
•360 
35*647 
L 
37*276 
11*350 
45*400 
20 
16*584 
16*944 
0*000 
•360 
38*912 
r 
22*434 
18*590 
52*346 
43*376 
30 
30 
16*342 
17*449 
16*862 
17*913 
0*004 
0*000 
•523 
•464 
43*432 
46*056 
44*744 
30*786 
30*636 
46*179 
45*954 
40 
40 
16*443 
17*344 
17*020 
17*886 
0*004 
0*000 
*577 
•546 
46*532] 
44*236 
45*384 
35*406 
32*112 
35*406 
32*1 12 
50 
50 
16*083 
17*415 
16*578 
17*890 
0*000 
0*000 
*495 
•475 
43*481 1 
45*377 J 
44*429 
50*141 
33*030 
33*427 
22*020 
60 
60 
16*508 
17*531 
17*071 
17*904 
0*000 
0*000 
•563 
*373 
41*763] 
41*224 J 
41*493 
52*120 
31*950 
22*336 
13*692 
70 
70 
16*944 
17*920 
17*356 
18*184 
0*000 
0*000 
*412 
•264 
34*000] 
34*912 j 
34*456 
57*435 
30*464 
14*358 
7*616 
80 
80 
17*061 
19*442 
17*338 
19*562 
0*010 
0*010 
*287 
•130 
24*424' 
20*474 j 
22*448 . 
62*325 
23*498 
6*925 
2*611 
90 
90 
19*301 
18*570 
19*446 
18*619 
0*008 
0*008 
*153 
*057 
13*444 | 
12*984 j 
13*164 
Section III. — Boiling-points. 
For methods and instruments employed in estimating the boiling-points, specific 
gravity and rate of expansion, and the compressibility* (Sections III., V., and VI.), see 
the paper “ On the Specific Heat and other Physical Characters of Mixtures of Ethylic 
Alcohol and Water,” by A. Dupre, Ph.D., and F. J. M. Page, B.Sc., Phil. Trans. 1869, 
p. 591, Sections III., V., and VI. 
Table IV. gives the boiling-points found, the barometer standing at 7574 millims. 
The third column gives the boiling-points calculated on the assumption that they are 
proportional to the weight of the constituents. 
* Instead of using an air-pump for forcing air into the apparatus, an iron bottle containing liquid carbonic 
anhydride was employed. The water in the apparatus being covered with a layer of oil, to prevent absorption 
of carbonic anhydride, any desired pressure could easily be obtained by simply turning the screw-valve of the 
iron bottle to the requisite extent and time. 
