446 



Mr. Latimer Clark on a 



[June 20, 



As it was desirable to determine the value of the force of the element in 

 absolute measure and in terms of the British-Association units, a very 

 careful series of measurements was made by the electrodvnamometer con- 

 structed for the British-Association Committee, and referred to in their 

 Report for 1867, and also by means of a sine galvanometer of somewhat 

 novel form. 



The following Tables give the results obtained : — 



I. By the Electrodynamometer. 



Date. 



Value of E 

 in volts. 





1871. 







Dec. 8 



1-4583 



3 cells. 



9 



1-4651 



3 cells. 



14 



1-4616 



3 cells. 



15 



1-4561 



3 cells. 





1-4579 



2 cells. 



16 



1-4586 



3 cells. 



16 



1-4517 



3 cells, coil turned 180°. 



16 



1-4552 



2 cells, coil turned back 180°. 



16 



1 -4555 



3 cells. 



16 



14535 



2 cells. 



16 



1-4564 



3 cells. 



18 



1-4649 



3 cells. 



19 



1-4562 



3 cells, coil turned 180°. 



19 



1-4558 



3 cells, coil turned back 180°. 



20 



1-4615 



3 cells. 



20 



1-4539 



3 cells. 



20 



1-4551 



2 cells. 



21 



1-4549 



3 cells. 





1-45735 



Temperature 15° - 5 Cent. 



II. By the Sine Galvanometer. 



Date. 



YalueofH. Value of E. 



Remarks. 



1872. 

 Feb. 9 

 9 

 9 

 10 

 10 

 11 

 18 

 19 

 19 

 20 

 20 

 24 

 24 



788 

 788 

 788 

 788 

 788 

 788 

 787 

 787 

 787 

 787 

 787 



■45605^ 

 45457 ! 



45400 ! 

 45809 ] 

 •45669 j 

 ■45799 ; 

 45566 1 

 45671 J 

 •45680 \ 

 ■45752 j 

 45645 \ 

 45522 

 •45492 J 



Galvanometer wound with 

 8 turns of German- silver 

 wire. 



Eewound with 28 turns of 

 German-silver wire, 



Eewound with 27 turns of 

 German-silver wire. 



Mean. 



1-45621 



Temperature 15°'5 Cent. 



