ON THE SPECIFIC HEAT OF AQUEOUS SOLUTIONS. 
125 
If x is the corrected graduation reading of the watt balance, the power in watts 
expended in the calorimeter through the heater M 2 is therefore 
U = E 
M, 
M 2+/ 
X 10- 
5. Calorimeter Corrections. —The formulae for these corrections involved a series 
of experiments which may be briefly indicated. They are expressed in the following 
notation :—- 
Q = heat transferred to contents of calorimeter in joules, 
t = time in minutes, 
T b = mean temperature of the bath during the short intervals, 
T ob = mean temperature of obturator, 
T d = mean temperature of liquid in Dewar vessel. 
The plotting of the temperatures showed that the observations could be divided 
into short intervals of 2 to 10 minutes, during each of which a straight-line law held, 
Fig. 1. 
as will be observed from the specimen chart, fig. 1. (For details see Appendix.) The 
total of all corrections was less than 1 per cent, of the total energy applied. 
