264 



DR. A. RANSOME ON RESPIRATION. 



influence of the upward motion of the lever upon the 

 record of the forward push, he proposed to substitute a 

 pentagraphic motion for the sliding-stage (p) ; and the 

 apparatus, as it is now constructed, presents the appear- 

 ance shown in the figure. 



WATKINSQN.S 



A large number of observations have been made with 

 this new form of stethograph; but the tracings do not 

 materially differ from those given in the paper, nor do 

 they lead me to alter the descriptions which I have given 

 of the several curves. The alteration of the instrument is 

 an important one, however, and renders the results theo- 

 retically more trustworthy. 



