ELECTRICAL MEASUREMENTS 



331 



DOUBLE LEADS. n=about 133 complete alternations per sec. 



Coils. R" Correc. Queen. R+r. 



P, 901-9 14-55 887-85 90 + s 500-4 



u < 500-23 



P., " 3 639-35 



u " 4 639-6 



A 901-87 887-32 ? 4742-2 



" 133 4760-0 



C 901-9 887-35 44 1151-4 



44 1151-4 



Ratio. 

 5631 



7198 



5-3537 



1-2970 



In the above determinations the coils were arranged in the way as 

 indicated in the figure having leads of double bell wire. 



A SERIES OF DETERMINATIONS OF A UNDER VARIOUS CONDITIONS. 

 Open resistance R on table (original position). 



Cor- 



Coils. R" Correc. Queen. R+r. rec. 



A 902-0 14-55 887-45 149 + s 4776-5 -62 

 " " " " 196 + s 4818- " 



" 901-95 " 887-4 ? 4783-5 " 



" " " " 190 + s 4808-5 " 



Open resistance E moved up to coil A (b^). 



Aver- Com. 

 age. A'. Ratio. 



4786-58 1 5-3936 



2 

 4795-38 1 5-403 



2 



u " ? 4518- " 4517-38 2 5-0905 



Open resistance E moved to the other side of A (& 2 ). 



144 + s 4518- " 4518-88 1 5-0922 

 <( u u u ci 4521- " 2 



Coil A placed in P x position and open resistance E restored to its 

 position, and 159' of double wire added to the circuit. 



Cor- Aver- Com. 



Coils. R". Correc. Queen. R+r. rec. age. A'. Ratio. 



A 901-95 14-55 887-4 547- + 4129 -62 



547 " 1 



4676 



583 + 4129 

 583 



4712 



4693-38 2 5-2888 



Coil A at end of double wire 69' + 159' = 228' long. 



607 + 4129 

 607 



4736 



634 + 4129 

 634 



4763 



New leads placed in B circuit, the wires were about 6" from each 

 other. 



