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APPENDIX 



varnish between the lead and the stopper, which was of 

 cork, no varnish coming between that and the neck. The 

 electrometer was divided into thirty parts of 1-J- inch. 



The plate at first refused to go round, as mine had done 

 before, the cushions being drawn together by the glass, to 

 which they seemed to adhere, probably from their dampness. 

 After some time, however, this went off, and in about ten 

 minutes electricity was excited. 



The electrometer was then applied and went off at 7. 



2. Electricity was kept in the phial thirty seconds with- 

 out any appreciable quantity being lost. 



3. A hole was struck through two cards by the discharg- 

 ing wire. 



4. Much greater shocks were given to several people 

 than any that could be given by my machine. 



5. The phenomenon of the floor-cloth proving a con- 

 ductor was tried more fully than before. A wire (b, see 



figure) was passed through 

 the phial (a), the two ends 

 of which were taken hold 

 of by two people (c c), who 

 each took hold of another 

 person (d d) ; the operator 

 (e) then touched the phial 

 with his discharging wire, 

 and received the shock 

 through both arms, as did 

 (c c) and (d d). Sometimes, 

 however, the others (dd) 

 felt it only in the arm 

 by which they held (cc). 

 The comparative force of 

 the blows which each felt 

 were difficult to ascertain, 

 but we supposed that (c c) 



felt more than (d d), and probably the operator most of all. 

 The chief reason that this machine worked better than 



mine seems to be that the bottle was coated with varnish 



