OF THE NATIONAL PHYSICAL LABORATORY. 375 



Third Set of Comparisons. May and June, 1903. 



millims. 



Mean ice-point of gas thermometer before comparison = 176 "28 



after = 176'19 



Mean value of a from determinations before = '003660 



after == '003661 



Platinum thermometer K 2 : 



R = 2'62864 ohms before commencing comparisons, 

 = 2'62705 ,, at conclusion of 



F.I. = 1 '007 8 9 before commencing ,, 



= 1 '008 19 at conclusion of ,, 



8 = I - 5 10 mean value over a long period. 



