OF THE NATIONAL PHYSICAL LABORATORY. 



367 



place in the quantity of gas present in the bulb. The change in this case has also 

 been assumed as proportional to the time, since before the first experiment was made 

 the whole furnace was maintained at a high temperature for some time, and there is 

 no sufficient evidence that the change occurred otherwise than regularly. So far as 

 could be found by testing on the pump after the conclusion of the; series no leak 

 could be discovered, even when the bulb was at a full red heat, 



CONSTANTS for Gas Thermometer. Series II. 



I. Before the comparisons : 



Ice-points. 



II. After comparisons : 



(4) 



Mean ice-point after "I 

 comparisons. . = j 



Ice-points. 



H . 



182-67 



182-65 



182-66 



Dead space temperature. 



17-4 



17-8 



H 



IOO- 



Steam-points. 



Dead space temperature. 



(5) 



248-64 

 248-63 



16-3 

 16-6 



00367 1 5 

 003670 S 



00367 1 2 



