or Calorific Power of various Liquids. 215 
-n giving a detailed account of an experiment made with this 
apparatus, I shall have an opportunity of giving clear and precise 
ideas of the different parts of my apparatus, and of the particular 
objects which they are intended to attain. 
Having found by various preliminary experiments made with 
water that the capacity for heat of the cylindrical vessel with that 
of the thermometer employed to determine the temperature of 
the water which it contained, 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 594° F. | filled the copper bottle 
with the above oil, and corked it. I cooled it in a bucket of 
“water at the temperature of 444° F. The oil in the bottle 
weighed 82:55 grammes. 
The bottle having had time to acquire the temperature of 
441° F, was withdrawn from the bucket, and placed in a cylin- 
drical 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 443° F. : 
The bottle being submersed 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 contained 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 564° of F. where it 
remained a long time stationary, and afterwards began to ascend 
slowly. 
The capacities for heat of the warm bodies which 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 .¢.. 2043 
The capacity for heat of the bottle containing the oil was 
equal to that of ..........++0+++.+ 8°36 grammes of water, 
And to this we must add the cold water 
adhering 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 experi- 
ment that this quantity of water was .... 1°04 
Totalae ite. O40. - 
O04 Now 
