438 



CHAMBERLAIN. 



Table XI. — Oomparative average systolic blood-pressure with 12. 5 -centimeter 

 armlet for 111 blonds and 118 brunettes, 1909-Group. 



Type. 



Blond _... 

 Brunette . 



Average 

 age. 



Years. 

 2.5.5 



25.1 



1 



First 

 quarter. 



Second 

 quarter. 



Third 



quarter. 



mm. 

 114.2 

 115.1 



Fourth 

 quarter. 



Average 



for 



year. 



mm. 

 115.8 

 118.6 



mm. 

 112. 5 

 115.3 



mm. 

 116.8 

 118.2 



mm. 

 114.8 

 116.8 



Table XII. — Comparative average systolic blood-pressure with 12. 5 -centimeter 

 armlet for 206 blonds and 198 brunettes, 1910— Group. 



Type. 



Avera£re^^''°"'^ 

 „t5®i*l"arter 



"'=''■ 1910. 



Third I Fourth 

 quarter quarter 

 .1910. ; 1910. 



Blond 



Brunette. 



Years. 

 27.4 



28.1 



First 



quarter 



1911. 



Second 



quarter 



1911. 



mm. 

 118.0 

 117.3 



.\verage 



for 



year. 



mm. 

 117.4 

 117.7 



mni. 

 117.6 

 117.6 



Since the blood-pressure is in reality an index of the functional capac- 

 ity of the heart, as correlated with the peripheral and visceral resistance 

 and the volume of the circulating fluid, it would seem that its determina- 

 tion should be an excellent indication of the circulatory condition of a 

 group of men. It will be observed that the pressures recorded in the 

 tables are in close accord with the findings of other tropical observers. (8) 

 We have found the blood-pressure for Filipinos to be approximately the 

 same as the figures given in Tables XI and XII. This feature' together 

 with other points relating to the blood tension in the Tropics will be 

 discussed at length in a subsequent communication devoted to blood- 

 pressure alone. (20) It wil) be sufficient at this time to point out that 

 the average pressures throughout the year for the blond. s and the brunettes 

 of the 1910-Group were identical while in the smaller 1909-Grroup the 

 difference was 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. This is a difference of only 0.6 

 millimeter, an amount which is entirely without significance. It should 

 be noted that the average ages of the two groups were approximately 

 the same, the maximum difference being only 0.7 year. 



Dynamometer ohservafAons. — These strength tests were made with the 

 usual hand dynamometer which registers simply the force of the maxi- 

 mum grip. The results appear in Tables XIII and XIV. 



