294 



Mr, H. F. W. Burstall on the Measurement 



This wire was destroyed by accident during my absence 

 before a new value of B could be determined. 







Thermometer No. 4. Wire O0025 inch diam. 

 E =0-592. I^-Ro =0-223. 5=1-90. 



Percentage of 

 stroke. 



Observed Resist- 

 ance, ohms. 



pt. 



Temperature 

 on air-scale. 



Explosion 

 10 

 20 

 30 

 40 



2-529 

 2-580 

 2-576 

 2-499 

 2-459 



878 

 891 

 890 

 855 



837 



1080 

 1100 

 1100 

 1040 

 1010 



The wire partly fused during the observation at 50 per cent. 

 These experiments were made during a period of intense cold, 

 and the indicator diagrams showed the pressures to be lower 

 than usual. The temperatures were lower than those of 

 Jan. 1-5 or March 7-20, otherwise the line wire on thermo- 

 meter No. 5 would not have remained intact so long. 



March 1th. 



Thermometer No. 4. Wire (V0025 inch diam. 

 Air temperature 10° C. Circulating water 46° C. 



R before, 0*537 ohm. 

 R after, 0551 ,, 



Ri-Ro before, 0-208. 

 R x -R after, 0'208. 



8 before, 1-81. 

 c after, 1-75. 



Percentage of 



Observed Resist- 



pt. 



Temp, on air-scale. 



stroke. 



ance, ohms. 



5=1-78. 



10 



2-437 



913 



1115 



20 



2-450 



920 



1120 



30 



2-381 



886 



1090 



40 



2-333 



861 



1060 



50 



2-304 



849 



1015 



70 



2204 



801 



940 



80 



2-113 



757 



880 





