6o I'olla on Animal Elc&r'ic'ifj. 



manner, according to my principles ; and indeed it canJiot 

 be explained in anv other, as every thing tends to confirm 

 my affertion, and to prove it in various ways. The contact of 

 different conda6lors, particularly the metallic, including 

 pvriles and other minerals as well as charcoal, which I call 

 «in,' conduftors, or of ihcfirji dnfs, with moid eonduflors, 

 or conduclors of ^icfrcond clnfs, agitates or diHurbs the elec- 

 tric fluid, or gives it a certain impulfe. Do not afk in what 

 nianner: it is enough that it is a principle, and a general 

 principle. This impulfe, whether produced by attra<f:lion or 

 any other force, is different or unlike, both in regard to the 

 different metals and to the different moid conduftors, fo that 

 the direction, or at leaft the power, with which the eleftric 

 flnid is impelled or excited, is different when the conductor 

 A is applied to the conduftor B, and to another C. In a 

 pcrfeft circle of conduftors, where either one of the fecond 

 clafs is placed between two different from each other of the 

 firft clafs, or, contra riwife, one of the firil clafs is placed 

 between two of the fecond clafs different from each otlier, 

 an dcftric ftream is occafioncd by the predominating force 

 <:ither to the right or to the Icft-^-a circulation of this fluid, 

 which ceafes only when the circle is broken, and which i« 

 rcHcwed when the circle is . again rendered complete. This 

 method of connefting the diti'crent conductors will be more 

 readily comprehended by turning to the figures, (plate I,) 

 where the capital letters denote ihe different conduclors or 

 exciters (moteursj of the firft clafs, and the fmall letters thofe 

 of the fecond clafs. Fig. i and 3 exprefs the two cafos 

 above mentioned. 



I confider it asalmoft fuperfluous to obferve, that when the 

 circle confifts merely of two kinds of condudtors, however 

 different or however numerous the pieces may be of whicb 

 each confifts (as fig. 3, 4, 5 and 6), two equal powers are 

 oppofed to each other; that is, the elyclric l^iid is impelled 

 vvith equal force in two dificrent diieclions, and ?onfequently 



