164 THE HYGIENE OF THE CIRCULATION 



EXPERIMENTS AND DEMONSTRATIONS 



Materials: Roller bandages of cheese cloth, 2V 2 in. wide, 3 

 yds. long, tightly rolled ; triangular 1 or handkerchief bandage. 



1) Locate pulse in wrist; in upper arm at inside edge of 

 biceps muscle ; at back of and below bony prominence of ankle 

 on inside; behind knee; at inner upper part of thigh; at side 

 of larynx in neck ; in front of ear ; and behind collar bone. 



2) Practise shutting off blood current. 



a) In arm, by applying pressure upon arteries in upper arm 

 and back of collar bone. Test effectiveness of pressure by 

 obliteration of wrist pulse. 



b) In leg, by pressure upon large artery in thigh and back 

 of knee. Test effectiveness by obliteration of ankle pulse. 



3) Practise bandaging a pad or stone over pressure points 

 for shutting off arterial blood supply to arm and leg. Test 

 efficiency as in 2). 



4) Adjustment of circulation to activity as shown by heart 

 beat: Test and record rate of pulse on awaking before rising; 

 on first sitting up before standing ; on standing ; after dressing ; 

 seated at table before breakfast; after breakfast while still 

 seated ; before and after climbing a flight of stairs ; and before 

 and after running. 



5) Action of valves in veins : 



a) Find large veins on back of hand, and stroke slowly with 

 moderate pressure toward wrist and toward knuckles. Note 

 changes. 



b) Place one finger on end of a vein toward knuckles, and 

 with another finger stroke same vein toward wrist. Carefully 

 compare results with a). Make diagram of veins showing 

 location of valves and direction of action. 



1 Each pupil should be encouraged to get the printed cloth 

 bandage known as Esmark's Triangular Bandage, for sale at 10 

 cents, by the Society for Instruction in First Aid to the Injured, 

 105 East 22d Street, New York, or by the Health Education League, 

 113 Devonshire St., Boston. 



