124 ANALYSIS OF 'fHE GALVANIC PILE. 



by more of the Jluid coming from the ground to the side B, 



the middle point becomes positive; and if the acceleration 



proceeds from some part of the Jluid flowing into the ground 



by the side A, the middle point becomes negative. 



Chemical ef- This experiment shows also how unfounded is the idea, 



feet:, oft iepi e ^ at t ^ chemical effects here taken as an example are con- 

 no* connected # l 

 vrith positive nected with positive and negative energies. During the 



and negative course f the above observations with the condenser, the 

 energies. . . 



two chemical effects continued sensibly in the same degree 



at the extremities of the same wires, though these under- 

 went changes in their electric states. At wire 1, the electric 

 stale of which is the same as that of the point a, calx is pro- 

 duced whether it be positive or neutral: at wire 4, the elec- 

 trie state of which is the same as at point b, inflammable 

 air is produced whether it be negative or neutral: but the 

 phenomena are still more decisive at the wires 2 and 3, the 

 electric states of which are similar to each other and also to 

 that of the point c. Now here we see inflammable air at 

 wire 2, and calx at wire 3, whether they be positive, nega- 

 tive, or neutral. Whence results finally, that the real con- 

 nexions of these chemical effects with the course of the elec- 

 tric fluid are the following: calx is produced at the wires by 

 which' the fluid enters the water, and inflammable air at those 

 by which it goes out. 

 Exp. >n which The same experiments were already related in my work 



the pile being «'.' i a' » / « - i 



rendered alter- presented to the Uoyal Society in January 1800, awd re- 

 nately negative peated in my first paper; but in the former, sect. 544, I 



and positive r»y * . . ... . . , _ 



connexion with related another experiment still more striking, which 1 hod 



an electric ma- made at Berlin with Prof. Erman, who as well as myself 

 chine, the che- .-, u i i • i • • j 



mica 1 effects was t " en nmcn employed m galvanic experiments, and pos- 



were the same, sessed a very powerful electric machine. lie had at one 

 time an insulated pile of 200 groups of zinc and silver the 

 size of crown pieces, newly cleaned, by which the usual ef- 

 fects of the production of calx and inflammable air in the 

 water of a glass tube were going on very rapidly. We con-t 

 nected this pile with the rubber of the machine, the prime 

 conductor being in connexion with the ground; which was 

 a most powevful way of producing the negative state in the 

 whole pile, so that it drew sparks from our hands at a great 

 distance; however we perceived no change in the glass 



tube* 



