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current of 2 volts, or with a faradaic current of 2 volts at a distance 
of secondary bobbin on 57 
75 grammes. 
The string-galvanometer with permanent magnet is used at moderate 
strain of the string (15 from 60 degrees). 
The experiment is begun by stimulating the muscle with a single 
closing-inductionstroke, after which the periodical galvanie stimulating 
follows. 
The weight to be raised amounts to 
In the beginning of this galvanie stimulating the muscle answers 
with separate contractions, but is soon in tetanus. After some time 
the muscle is again stimulated by the closing-inductionstroke. The 
mechanical and electrical effect hereof has increased. The photo- 
graphic registration shows how the electric phenomena as an answer 
to the stimulus by means of the interruptions of the galvanic current 
in general have increased, also how the reaction on the single 
inductionstroke begins to decrease again in size. The tetanus is 
attended with a total removal of the rest-position of the string. 
In fig. 3 it is seen, how the musele under the influence of the 
fatigue now shows a slight electric phenomenon as a reaction upon 
the periodical opening and breaking of the constant current, besides 
how the electric phenomenon as an answer to tbe closing induction- 
stroke is pretty considerable, but is not accompanied by a mechanical 
reaction which is not even to be observed as tetanus at the galvanic 
stimulus. The muscle namely has entirely become slack. The electric 
phenomenon of the induction-stimulus has become complicated and 
stretched. 
1°/, hours after the commencement of the experiment the muscle 
shows neither mechanical nor electric reaction either on galvanic and 
on faradaie stimulus. Only when the faradaie stimulus is strengthened 
the electric reactions become visible again. 
Summa summarum, the following, with respect to our subject, 
most important facts may be gathered from the series of experiments 
mentioned before and partly described there. In the first place it 
appears that under definite circumstances, in this case fatigue, also 
for a skeleton-muscle like the M. gastrocnemius, an independence 
comes to the front of electric and form-changes of the muscle. It 
further appears that the more or less congruency of the above reactions 
is dependent on different factors, among others the strength of the 
animal. 
In general I got, even with the slack M. gastrocnemius of Rana, 
the same results, as to change of length and mechanical reaction, as 
Bricke found for the M. sartorius, as to change of thickness and 
