46 



METHODS OF OBTAINING HUMAN AND ANIMAL BLOOD 



from the tissues for a distance of at least one inch; a ligature is now 

 tied securely about the artery, at the distal end of exposure; a second 



FIG. 23. METHOD OF BLEEDING A GUINEA-PIG. 



ligature is placed in position, and looped loosely, ready to tie about the 

 proximal end (Fig. 22). 



