476 



CHAMBERLAIN. 



Table IX. — Comparative average systolic Mood-pressures and pulse rates for 111 

 Hands and 118 brunettes, 1909-Group. (12.5-centvnieter armlet.) 



Type. 



Aver- 

 age 

 age. 



First 



quarter 



1909. 



Second 



quarter 



1909. 



Third 



quarter 



1909. 



I'ourth 



quarter 



1909. 



Average for 

 year. 



Pres- 

 sure. 



Pulse. 



Pres- 

 sure. 



Pulse. 



Pres- 

 sure. 



Pulse. 



Pres- 

 sure. 



Pulse. 



Pres- 

 sure. 



Pulse. 



Blond 



Years. 

 25.5 

 25.1 



mm, 

 116 

 119 



82 

 86 



mm. 

 113 

 115 



93 



92 



_ 



mm. 

 114 



89 



mm. 

 117 



85 

 86 



mvi,. 



114.8 



116.8 



87.2 

 89.2 



Brunette 



115 94 1 118 











Tabue X. — Comparative average systolic blood-pressures and pulse rates for 206 

 blonds and 198 brunettes, 1910-Group. {12.5-centimeter armlet.) 



-Type. 



Blond 



Brunette.— 



Aver- 

 age 

 age. 



Second 



quarter 



1910. 



Third 



quarter 



1910. 



Fourth 



quarter 



1910. 



First 



qurater 



1911. 



Second 



quarter 



1911. 



.4verage for 

 year. 



Pres- 

 sure. 



Pulse 



• 



Pres- 

 sure. 



Pulse 



Pres- 

 sure. 



Pulse 



Pres- 

 sure. 



Pulse 



Pres: 

 sure. 



Pulse 



Pres- 

 sure. 



Pulse. 



Years. 

 27. i 

 28.1 



mm. 

 116 

 118 



77 

 78 



mm. 

 119 

 117 



78 

 77 



mm. 

 118 

 118 



78 

 78 



mvi. 

 117 

 118 



77 

 77 



mm. 

 118 

 117 



77 

 77 



mm. 

 117.6 

 117.6 



77.3 

 77.3 



It will be observed that the average pressures throughout the year 

 for the blonds and brunettes of the 1910-Grroup are identical while in 

 the smaller 1909-Group the difference is only 2 millimeters of mercury. 

 If the two groups .are combined we obtain an average for 317 blonds 

 of 116.7 millimeters and for 316 brunettes of 117.3 millimeters a dif- 

 ference of only 0.6 millimeter. The pulse rate for the two complexion 

 t3rpe.3 is the same in the 1910-Group and varies only 2 beats in the 1909- 

 Group. Therefore it can be concluded that the complexion type does 

 not appreciably affect the blood-pressure or the pulse rate in the Tropics 

 when men are at rest. To determine if there was a difference after 

 exercise we had special observations on the pulse and blood-pressure taken 

 on two occasions, once near the beginning and once near the end of the 

 year of observation. The results appear in Table XI. 



Table XI. — Comparative average systolic blood-pressures and pulse rates on 136 

 blonds and 124 brunettes of the 1910-Group after exercise. (12. 5 -centimeter 

 armlet.) 



Type. 



I 



Second quarter 

 1910. 



Second quarter 

 1911. 



Average for two 

 observations. 



Pressure. 



Pulse. 



Pressure. 



Pulse. 



Pressure. 



Pulse. 



1 



Blond - 



mm. 

 125.4 

 128.2 



85.9 



87.4 



mm. 

 123.8 

 . 125. 7 



82.7 

 83.8 



mm.. 

 124.6 

 127.0 



84.3 

 85.6 



Brunette 





These observations were made as soon as possible after the men had 

 completed a march, a period of drill, or some other form of exercise 



