THE MUSCLES. 



545 



Fig. 190. The Pendulum Myograph. (FOSTER.) 



A, Smoked glass plate, swings on the "seconds" pendulum, B, by means of 

 carefully adjusted bearings at C. The contrivances by which the glass plate can 

 be moved and replaced at pleasure are not shown. A second glass plate, so 

 arranged that the first glass plate may be moved up and down without altering 



' 



