EXISTENCE OF ICE AT HIGH TEMPERATURES. 
135 
water had been jerked out during the operation, the true weight 
of the ice, and therefore its temperature, could not he found. 
But since the calorimeter had slightly risen in temperature, the 
ice must have been above 80° C. 
From the nature of the experiment, as carried out on the 
present scale, the weight of the ice which can be dropped into 
the calorimeter is only small, and therefore the rise in tem- 
perature is but slight. But since a fall in temperature of a 
much larger amount ought to have been obtained had the ice 
been at 0°, it is considered that the above experiments are con- 
clusive. Great care was taken, in order to obtain correct 
temperatures in the calorimeter. The latter was enclosed in 
several casings, and the water was allowed to stand in it for 
several hours before the experiment, so that it might first 
attain the temperature of the room, whilst the time which 
elapsed between the readings of the thermometer before and 
after the ice was dropped in would not be more than from 10 
•to 15 seconds. 
In the course of the next few weeks I intend to make one or 
«two more determinations, and, if possible, on a larger scale. 
