1880.] Strained Material, Ley den Jars, and Voltameters. 415 



mined. It is evident, also, that the values of log (v — A) and t when 

 plotted as co-ordinates of points give a straight line and enable B and 

 J3 to be determined. We found that equation (3) for the particular 

 experiment in question became 



w '=474-177-346-*-oooo637f (4), 



and giving values to t we have calculated column 3 in the following 

 table. Proceeding in precisely the same way with the remainders 

 (v—v') given in column 4, we obtain the other coefficients and ex- 

 ponents in the equation (2). 



Soaking out of the Residual Charge in the Leyden Jar. 

 June 16, 1876. 



Time in 



Observed value 



vf calculated 



Difference 



minutes. 



of v. 



from (4). 



(v — v') . 



A 

 U 



A 



. . . U . . . 



zyo / . . . 



zyo / 



A. K 



QO 



. . . oZ 



zyo t 



Ol A • *7 

 Z14 4 



1 



1 



1 AO 



1UZ 



zyo o 



1 CiA .O 



194 o 



z 



1 OA 



1ZU . . . 



zyo y 



i/o y 





. . loo . . . 



zy/ 1 . . . 



ioy i 



7 



100 . . . 



00*7. A 



zy/ 4h 



14Z 4 



1 A 



1U 



loo 



OQ7.Q 



zy/ o . . . 



izy o 



OA 



zu 



1 OA 



iyu . . . 



zyo o 



lUo O 





. . — io . . . 



. OUl JL . . . 



oO JL 



80 



.. 236 



305-4 



69-4 



150 



264 



312-8. .. 



48-8 



250 



296 



322-8 



26-8 



350 



324 



332-1 



8-1 



500 



345 



345-0 







700 



362 



360-1 



-1-9 



1,000 



398-4 



380-2 



1-8 



1,500 



404-5 



405-8 



1-3 



2,000 



423-9 



424-4 



0-5 



2,500 



437-9 



437-9 







3,000 



447-6 



447-7 



01 



4,000 



459-0 



460-1 



ri 



5,000 



465*4 



466-6 



1-2 



6,000 



469-5 



470-1 



0-6 



7,000 



471-8 



471-9 



o-i 



8,000 



472-9 



472-6 



-0-3 



9,000 



473-6 



473-7 



o-i 



"We have stated above that we slightly corrected, by means of a 

 curve, the values of v before putting them in column 2. It would 



