CONTINUOUS ELECTRIC CALORIMETRY. 
129 
Table XI. — Correction for Variation of Gradient in Flow-Tube, Calorimeter C, 
Series 8. 
Number of 
Experiment. 
Temperature, 
Centigrade. 
Values of Flow. 
Heat-Loss per 1°. 
Specific Heat in Joules. 
Q'. 
Q". 
Table. 
Reduced. 
Table. 
Corrected. 
LII. 
o 
74-05 
•621 
•384 
•08469 
•08198 
4-1920 
4-1950 
LIII. 
91-55 
•644 
•402 
•10011 
•09643 
4-2017 
4-2055 
LIY. 
80-38 
•617 
•388 
•09218 
•08891 
4-1951 
4-1986 
LV. 
68-21 
•603 
•388 
•08283 
•08011 
4-1890 
4-1919 
The effect of the correction on the curve of variation of specific heat is most 
readily appreciated by taking the approximate formula for the variation of the heat- 
loss with temperature, given by Dr. Barnes, p. 253, which, when slightly reduced to 
allow for the correction of the value of h given in equation (15), becomes 
h = -0300 + -00070/.(16). 
This formula represents the experimental results very fairly, except for the lower 
temperatures in the neighbourhood of 0° C. It leads to the following values of the 
corrections for the specific heat in joules and calories. 
Table XII. — Variation of Gradient-correction with Temperature, and Corrected 
Values of Specific Heat of Water. 
1 
Temperature, 
Centigrade. 
° 
Heat-Loss. 
Correction T05 ho 2 / Q'Q". 
Results, 
1900, 
Corrected. 
Reduced 
to H scale. 
Formula (16). 
E0* 
Joules. 
Calories. 
o 
0 
•0300 
•033 
•00038 
•00009 
1-0080 
1-0084 
10 
•0370 
•039 
•00058 
•00014 
1-0029 
1-0031 
20 
•0440 
•045 
•00082 
•00019 
1-0000 
1-0000 
30 
•0510 
•051 
•00109 
•00026 
0-9987 
0-9986 
40 
•0580 
•058 
•00141 
•00034 
0-9986 
0-9984 
50 
■0650 
•066 
•00177 
•00042 
0-9993 
0-9989 
60 
•0720 
•074 
•00218 
■00052 
1-0005 
1-0000 
70 
•0790 
•083 
•00263 
•00063 
1-0018 
1-0013 
80 
■0860 
•094 
•00312 
•00074 
1-0033 
1-0027 
90 
•0930 
•105 
•00364 
•00087 
1-0048 
1-0041 
100 
•1000 
•117 
•00420 
•00100 
1-0062 
1-0055 
In calculating the correction, the value of the product Q'Q ,y is taken as 
'64 X ‘39 = - 25, which represents fairly the values of the larger pair of flows on 
VOL. CXCIX.—A. 
s 
