430 On the Capacity for Heat, or 



Having found by various preliminary experiments 

 made with water that the capacity for heat of the cylin- 

 drical vessel with that of the thermometer employed to 

 determine the temperature of the water which it con- 

 tained, was equal to that of 24.3 grammes of water, and 

 that the specific heat of the bottle of copper was equal 

 to that of 8.36 grammes of water, I made the following 

 experiment with purified linseed-oil. 



I put into the cylindrical vessel 180 grammes of 

 water ; the temperature of the room was 59^ F. I 

 filled the copper bottle with the above oil, and corked it. 

 I cooled it in a bucket of water at the temperature 

 of 44-3- F. The oil in the bottle weighed 82.55 

 grammes. 



The bottle, having had time to acquire the tempera- 

 ture of 44j F., was withdrawn from the bucket, and 

 placed in a cylindrical vessel of tinned iron, of about 

 four inches diameter and six high, filled to the height 

 of four inches and a half with water at the temperature 

 of 44f F. 



The bottle, being submerged in this vessel of cold 

 water, was carried into the room where I had placed the 

 small vessel of copper belonging to the apparatus; it 

 was then taken out of the cold water, and plunged into 

 the water contained in the small cylindrical vessel of 

 copper, which contafned 180 grammes of water at the 

 temperature of 59! F. 



A thermometer having a cylindrical reservoir four 

 inches long, which was placed in this vessel beside the 

 copper bottle, soon fell, and in three or four minutes it 

 marked 56^ of F., where it remained a long time sta- 

 tionary, and afterwards began to ascend slowly. 



The capacities for heat of the warm bodies which 



