Comparisons of Mercury and Platinum Thermometers. 25 



Table X. 



Platinum Thermometer in Sulphur Vapour. 



In sulphur vapour all the precautions must be taken which are mentioned on 

 pp. 144-147, Phil. Trans. Eoy. Soc, A, 1891, vol. clxxxii. 



Time. 

 Jan. 23. 



Coils. 



Bridge-Wire 

 Eeading. 



Temperature 

 of Coils. 



Baro- 

 meter 

 (corr.). 



E s . 



(Box 



No 6.) 



6.15 

 6.18 

 6.21 

 6.25 

 6.26 

 6.30 

 6.32 



A, E - 680 



B.W. Eeadg. --675 

 Cal cor. +-009 

 Zero cor. — -078 



B.W. Eeadg. --671 

 Cal. cor. +-009 

 Zero cor. — 078 



B.W. Eeadg. --672 

 Cal. cor. +-009 

 Zero cor. — '078 



B.W. Eeadg. -5-754 

 Cal. cor. + 095 

 Zero cor. —'078 



B.W. Eeadg. -5-755 

 Cal. cor. +095 

 Zero cor. -078 



B.W. Eeadg. +4527 

 Cal. cor. —076 

 Zero cor. —"078 



B.W. Eeadg. +4-528 

 Cal. cor. — - 076 

 Zero cor. -078 



20-36 

 Cor. +064 



20-35 

 Cor. +062 



ft 



mm. 

 769-20 



JJ 



JJ 



76915 

 769-20 



769 25 



679-513 

 679-515 

 679-514 

 679510 

 679-509 

 679-503 

 679-504 



Coil cor. ... +-193 



it 



A, E, H .. -085 

 Coil. cor. ... +-185 



A, F, G, H... =675 



Coil cor. ... +-068 



Mean 





769-20 



679-510 











E s = 679'510 mean box-units (Box No. 6) when barometer = 769 "20 mm. 



Hence ~R X = 358-078, 

 E = 258-362, 

 FI = 99-716, 

 Rj/Bo = 1-38596. 



