m 



M. R. Kohlrausch's Theory of the 



the operation, so that using small angles, several discharges are 

 sometimes eifected during the first miuute. When we subsequently 

 reduce the results obtained by uiaking use of the small magnet 

 and small deflections u, to the deflection of the sti-ong needle and 

 large deflections a, made use of in the observation of the original 

 charge, and the sinking of the same, that is, in the construction 

 of the tables a, b, and c, we obtain the residue (which, however, 

 is still to be set free from the influence of the loss of electricity) 

 equal to the sum p + p' + p"+ .... of the single residual dis- 

 charges. 



To the tables a, b and c, § 1, belong the corresponding ones 

 a', V, d, in order to form the basis of a calculation. At the 

 time when the last observation recorded in each of the first men- 

 tioned tables was made, the apparatus was completely discharged 

 by connecting the inner coating of the jar for about half a second 

 with the moist earth of the garden. At the same time the con- 

 necting wire was removed from between the jar and the electro- 

 meter, the new magnetic needle was suspended, and the new 

 angle « arranged. The connexion between the jar and the in- 

 strument being again established, a second observer noted the 

 times of the single discharges. These are set down in the 

 columns t, and are reckoned in seconds, commencing from the 

 moment of the first discharge. The numbers under p denote 

 the residues which again appeared. 



§3. 



The question now presents itself, what is it that we have 

 actually measured by the sine-electrometer ? According to my 

 conviction, most certainly the same as we should have measured 

 if at the same moments we had tested the same point of the 

 knob. The electrometer in connexion with the interior coating 

 of the jar is, indeed, nothing else tlian a continuation of the 

 knob. 



We have seen, however, in § 1, that the results obtained by 



