-s .\M> M-:K\I>. 



determined. 

 this 



The myograph >f Helmholtz (li-jicmls on 

 < )rii,mi;dly it cnusistrd ..f ;i ylas.- i-ylin- 



J-'it;. 17. Mvi>i:T:.\rir T IT i I..MIIOLTZ. 



.ii'r natiii'iil .-i.'c'.i 



diT \\liicli rntntcd r.-ijiidly >ii ils u\\n ;i\is. Tin- ;i]ij):i- 



rat us lias, lm\\e\cr, since undergone m&ny alterations. 



