CIRCULATION. 107 



(3) Is there any variation, among the member of the 

 division, in the location of the radial artery? 



(4) May excessive muscular development affect the 

 ease with which the artery may be located and its 

 pulsations studied ? 



(5) May excessive deposit of adipose tissue hinder 

 the observations of the pulse? 



(6) May faulty position of subject or of his clothing 

 affect the pulse ? 



The digital observation of the radial pulse. 



(7) Feel the pulse with the side or back of the finger; 

 then with volar surface and tip of each finger of each 

 hand and note the finger or fingers with which the 

 feeling is most acute. It will be wise to always use 

 these fingers in all tactile examinations. Their 

 acuteness of feeling will increase with practice. 

 One may thus acquire the educated touch TACTUS 

 ERUDITUS. 



(8) How much may be learned of the pulse by means 

 of the touch alone ? Observe and note (a) fre- 

 quency; () rhythm; (V) volume; (//) strength; (e) 

 compressibility. (/) May anything else be deter- 

 mined by this method ? 



The Sphygmogram. 



(9) Take at least three pulse tracings of each indi- 

 vidual in the division, (a) Compare the tracings 

 taken from one individual; if they differ, determine 

 the cause of the difference. () Compare tracings 

 of different members of the division. Determine, if 

 possible, the causes of the differences. 



(10) Do variations of the relations of the artery affect 

 the sphygmogram? Does the adjustment of the 

 instrument affect the sphygmogram? Does the 



