98 



PHYSIOLOGY OF THE CIRCULATION. 



angle of the syphon rested, so that the orifice of the 

 long arm would discharge its contents on the exterior 

 of the vessel (vide Fig. 2). 



I must not omit to mention that the lower half of 

 the membranous tube had been previously punctured 



I'M;. 2. 



a, The membranous reservoir; l>, the descvinling portion of the 

 first glass tube ; c, its ascending portion ; </</, tlir membranous tube ; 

 ec, the glass syphon ; /, tin- vessel containing the external coloured 

 liquid. 



with a fine needle, so as to make in it a great number 

 of small lateral openings. This was done with the 

 view of rendering the progress of the experiment 

 more perceptible ; for the great length of time 

 requited for the passage of an appreciable quantity 



