42 Electromagnetic and Calometric Absolute Measurements. 



Series III. 

 P moderate, I large. 





Method 1. 



Sept, 28, 1876. 



, 0-9525 x 10 10 



j> ^^? ?> 



0-9546 x 10 10 



5? ^0 ? » 



0-9581 x 10 10 



Oct. 1, „ 



0-9552 x 10 10 



?? * ••• 



0-9557 x 10 10 



?• **"? ?? 



0-9560 x 10 10 



The mean value is 



0-9550 xlO 10 



(millim.X 

 sec. /' 



Series 1 IV. 

 P moderate, I large. 



Method 2. 

 Sept. 28, 1876, 0-9568 x 10 10 (^!p) 

 0-9561 x 10 10 



/millim. 



» 



29, 



?> 



•■? 



30, 



1} 



Oct, 



1, 



V 



?) 



3, 



)) 



V 



4, 



V 



0-9541 x 10 10 



0-9552 x 10 10 „ 



0-9543 x 10 10 „ 



0-8589 x 10 10 „ 



The mean value is 0-9559 x 10 10 „ 



The final results of these measurements, effected under very 

 diverse circumstances, agree within vanishingly small differ- 

 ences. They furnish the total result, that the absolute value 

 of the Siemens empirical unit, derived from what takes place 

 in voltaic induction called forth by sudden variations of cur- 

 rent, amounts to 0-9554 x 10 10 ("H 11 ^). 

 7 \ sec. / 



On the basis of the laws of magneto-induction, according to 

 the first method, we had found as the absolute value of 



Siemens's resistance-unit the quantity 0*9545 x 10 10 ( — ' ) » 



\ sec. / 



this value accords to within jo^x °f its amount with that 

 found by the second method. On account of the frequent 

 repetition and manifold variation of the experiments, it may 

 well be taken as sufficiently certain that this accordance is not 

 accidental. From the almost perfect accordance of the final 

 results obtained by the two methods two important conclusions 

 can be drawn : — 



(1) The fundamental laws hitherto recognized of induced 

 currents of variable intensity represent with great precision 



