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amounted io exactly 1 Volt. This P. D. was continnally controlled 

 by a recently calibrated precision-galvanometer of Siemens and 

 Halske. In tliis way every millimeter of the wire represented 

 0.001 Volt. By means of a vernier 0.1 millimeter conld be read 

 without difficulty. Ever millimeter represented in this manner at 

 the same time one millionth part of a microconlomb. The shocks 

 of the current followed one another with intervals of 15 seconds. 



I liave succeeded, not without some ti-ouble, in obtaining two 

 complete series, one of which I liaNC entirely calculated and 

 inserted here. It consists of five separate series, each including 

 from eight to ten contractions, all taken from the same gastrocnemius, 

 but in each succeeding series the weight was increased. 

 Series. I. Weight 10 Gr. 



R 



375 



400 



425 



450 



475 



500 



525 



550 



600 



650 

 Consequently the 

 amounts to : 



R 



375 



400 

 425 

 450 

 500 

 [550 

 600 

 800 



