A NEW CURRENT WEIGHER, KT< . 



529 



The "a" and "6" positions refer to the multiple commutator and plug board, 

 fig. 25, and the "A" and "B" positions to the main commutator M, fig. 23, as explained 

 on p. 522. A change from "a" to " b " reverses the current in the suspended coils, 

 and a change from "A" to " B" reverses the current in all the coils of the balance. 

 Centigramme riders were employed, and the position O'OOGO in the (D S) experi- 

 ment indicates that the rider and balancing weights were on opposite sides of the 

 beam. The correction 0'0000 6 gramme is for the difference in density of the air 

 from '00 1 196. In all cases the sum of the balancing masses was computed to 

 O'l milligramme. 



TABLES OF RESULTS. 



The following tables, XII. and XIII., give particulars of determinations from 

 September, 1905, to April, 1907 ; no determination has been omitted, except when 



TABLE XII. (Cadmium Cell No. 2.) E.M.F. Determinations, using One Set 



of Coils. 



VOL. CCVII. A. 



Formula (7) and (8), p. 510. 

 3 Y 



