PKOHLKM 2().j 



2:i: 



Problem 20S : To deterniiiie tlie rate of your oini hrorthrat. 



Method. — Take your own pulso by placiii*!; the fourth finder 

 of your right hand on the left wrist, just at the hase of the tluunl) 

 about one inch up on the wrist ; or phice the finj?(T on the side 

 of the head just in front of the ear. After gettinj^ the pulso, wait 

 for a signal, then count the nunib(>r of beats for one minute. 

 Give your age and rate of your pulse per minute to a pupil chosen 

 to place the returns from the class on the ])oard arrangecl ''by 

 age." Classify boys and girls separately. 



Hctte. 



Age 60-65 66 70 



of P \xl s e. 



71-75 76-80 81-85 



6(> 90 



Conclusion. — 1. From this table make a grapii tliat will siiow 

 the normal heartbeat of the pupils of your class. 



2. Does sex have anything to do with the rate? 



3. Does age? 



Problem 204=: What is the effect of hard mental work nn the 

 pulse heat ? 



Method. — Under the direction of the teacher do some hard 

 problems in arithmetic for about five minutes. Now count pulse 

 as before and tabulate. 



Conclusion. — Does mental work affect the heartbeat? 



Problem 20r> : What effect has e.vereise on the heartbeat ? 



Method. — Under the threction of a leader, take a hard setiiim- 

 up drill for three minutes with the windows open. Couut the 

 pulse beats as before and tabulate. Also not(^ any difTerence in 

 respiration. 



