38 Mr. J. B. Tayler on the 



distance. The glass stirrer could likewise be worked, and 

 the thermometer read, without going up to the calorimeter. 

 These precautions were only taken in the later experiments. 



Fiff. 1. 



The thermometer used with the first two calorimeters was 

 graduated in tenths, and could be read to hundredths of a 

 degree. That used subsequently was graduated in hundredths, 

 and could be read to the one-thousandth of a degree. (The 

 results of the two sets of experiments can be distinguished by 

 the water-value of the calorimeter.) The experiments were 

 conducted in the Chemical department of the College, and no 

 special precautions could be taken to keep the room at 

 constant temperature ; and the thermometer was sometimes 

 subjected to changes two or three times as large as the one 



