REPORT—1885. 
Resistance Coil, Elliott, No. 140, ¢, 101. 
Date Temperature Resistance 
Nov. 24, 1884 é : 11°4 “99813 
eNO. Gs Fi a ila ho955 “99515 
EGE i 355 12°°8 “99847 
Nove, 55 229 “99851 
Dec. 5; ” 13°4 “99865 
ee 15°4 “S99LT 
July 30, 1885 : ; 17°-2 ‘99961 
pete am f 2 z 18°°0 “99983 
998815, at 1491 C. 
000259 
Mean value : : 
Temperature coefficient 
The ten-ohm standards were then compared with the one-ohm by 
means of the arrangement suggested by Lord Rayleigh, and described in 
the Report for 1883, and from these values were obtained for the coils of 
higher resistance. 
The results are contained below. 
No. of Coil Resistance Temperature 
No. 141, G, No. 102 | 10:00103 16°-7 
No. 142, @, No 103 10-00169 16°75 
No. 143, @, No 104 99-9977 16°-05 
No. 144, ¢, No. 105 100-0108 16°-05 
No. 145, ®, Xo 106 1,000:306 17°-4 
No. 146, G, No. 107 1,000-276 174 
No. 147, No 108 10,0024 17°35 
No. 148, xy No. 109 10,002'4 17°35 
These experiments were carried out at the Cavendish Laboratory by 
the Secretary and Mr. H. Wilson, of St. John’s College. 
At the request of M. Mascart, the Secretary compared with the 
legal ohms of the Association three mercury copies of a legal ohm, 
constructed by M. J. R. Benoit, of Paris. A detailed account of these 
experiments was laid before the Physical Society.'_ The values found are 
given below. 
= Value found by Value found by : 
Soot Tees M. J. R. Benoit Bate Gs he 
37 100045 "99990 “00055 
38 1-00066 100011 00055 
39 "99954 OOD ‘000387 
Mean 1:00022 99972 “00049 
1 Phil, Mag. Oct. 1885. 
