60 G. A. Liebig—Specific Heat of Water. 
Readings on Thermometer. 
Cc a 
Time. In ealorimeter. In vessel A. 
243°39 0°00 
43 242°95 0°00 
44 242°50 0°00 
45 242°05 0°00 
In calorimeter. 
462 143°50 140°60 
47% 143°60 140°68 
48% 143°70 140°74 
Water running from time 45% to 463, therefore temperature of 
water in calorimeter at the instant of mixing is that at time 
45% or 241°75 and the temperature of mixture ‘the mean of 
140°53 a 143°40, now 
. 241°75 corrected +--019 for zero and + 046 for stem = 33°507 
143-40 corrected +°019 for zero and — 004 for stem = 19°741 t 
140°53 corrected 0°00 for zero and — 004 for stem = 19°729 
W — W=1574'8—392'5 + 35° as 1 | ¢, —t=33°507 — 19°735 
W. —W = 2419°9—1574841°1 t,—t,=19°735—0 
hence 
sp. heat 0°—19° _(1574"8—392°5 + 35°6 + 1:1) (33-507 — 19-735) 
ap. heat 19°—33° ———(2419°9—16748411)19735 
The temperatures throughout are on the absolute scale. The 
results are given in a more concise form in Table E. In this 
table the first two columns give the weight of the calorimeter 
and senna water before and after the addition of water from 
the reservoir A. The next eight, of which four are devoted 
to ihemnomelar 108,947 and four to 108,954, are eg ne by 
the readings, temperature of surrounding air, correction for pro- 
trading stem and reduced temperature (absolute scale). In 
=1°0034 
ture, occupy the lower row. The ratios of the specific heats 
between the assigned limits will be found in the last two col- 
umns, one of which is taken up by Rowland’s figures. 
Although it was attempted to make the limits coincide with 
Rowlaha's still in many cases this was impracticable and 
blanks have in consequence been left in three or four places. 
Where the temperature intervals are te a it will be seen 
that there is great similarity in the resu 
It may be interesting to further se nant these values with 
those which can be computed from the tables given in Pro- 
fessor Rowland’s paper on the mechanical eda of heat. 
The specific heat varids directly as the mechanical equiva- 
lent; it is therefore only necessary to plot a curve with the 
