CIRCULATION IN THE BLOOD-VESSELS 



FIG. 67. -.-Diagram of mercury kymograph arranged for an experiment, a, 

 Bent glass tube containing mercury forming the manometer ; 6, aluminium 

 float with rod, bent at right angles and ending in a writing point ; c, 

 small weight attached to silk thread suspended above writer and serving 

 to keep it against the smoked paper ; d, three-way stopcock ; e, artery 

 cannula ; /, bottle of sodium carbonate solution ; g, pump to raise the 

 pressure : this may take the form of a rubber bag. 



