Calorific Power of various Liquids. 431 



were cooled in this experiment were equal to that of 

 204.3 grammes of water ; viz., 



That of the water employed . . . . 180 grammes. 

 That of the vases and thermometer . . . 24.3 



Total . . . 204.3 

 The capacity for heat of the bottle containing the oil was equal to 



that of 8.36 grammes of water. 



And to this we must add the cold water ad- 

 hering to the bottle, when it came out of the 

 cold water, and was plunged into the water 

 contained in the copper vessel. I found by a 

 particular experiment that this quantity of 

 water was ...... 1.04 



Total .... 9.40 



Now, as the temperature of the warm water in the 

 cylindrical vase of copper was that of 59! before the 

 mixture, and 56^ after the communication of the heat 

 had been obtained, it is evident that this water was 

 cooled 2-f. But if we multiply the number of grammes 

 of water which the specific heat of this water represents, 

 and that of the vessel (= 204.3 grammes), by the number 

 of degrees which it has been cooled (2|) we shall have 

 a product which will express the number of grammes 

 of water which would have been cooled i F. by a 

 loss of heat equal to that which the vessel and its con- 

 tents supported in this experiment. It is 204.3 X 2.75 

 = 561.84 grammes. 



We shall now see what part of this heat was com- 

 municated to the bottle and to the small portion of 

 cold water attached to it, and what part to the oil con- 

 tained in the bottle. 



As the temperature of the bottle and its contents was 

 44 F. before the mixture, and 65^ afterwards, it is 



