142 The Philippine Journal of Science i9i6 



It is interesting to find that out of the twenty-one cases whose 

 ages range from 51 to 87 years eight had a systolic pressure 

 below 150 millimeters and five a pressure below 130 millimeters. 

 We were surprised to find that our oldest subject, an apparently 

 healthy old man of 87 years, had a systolic pressure of 124.6 

 millimeters of mercury. 



Table IV. — Comparison of systolic-pressure readings obtained by the 

 authors with those given by Chamberlain and by Woley. 



Chamberlain with Filipino subjects: 





Apparatus 



Riva Rocci 



Cuff (centimeters) 



12.5 



Cases 



366 



Average age (years) 



25 



Average systolic pressure (millimeters of mercury) 



116 



Systolic blood pressure (millimeters of mercury) — 





15 to 20 years of age 



112.8 



21 to 25 years of age 



115.4 



26 to 30 years of age 



117 



31 to 35 years of age 



116.9 



36 to 40 years of age 



112.3 



41 to 50 years of age 



114 



Concepcion and Bulatao with Filipino subjects: 





Apparatus 



Erlanger 



Cuff (centimeters) 



12.5 



Cases 



717 



Average age (years) 



28.5 



Average systolic pressure (millimeters of mercury) 



115.6 



Systolic blood pressure (millimeters of mercury) — 





15 to 20 years of age 



110.1 



21 to 30 years of age 



113.5 



31 to 40 years of age 



118.9 



41 to 50 years of age 



126.6 



51 to 60 years of age 



129.6 



61 to 90 years of age 



137.8 



Woley with American subjects: 





Apparatus 



Tycos 



Cuff (centimeters) 



12.5 



Cases 



1,000 



Average age (years) 



(?) 



Average systolic pressure (millimeters of mercury) 



127.5 



Systolic blood pressure (millimeters of mercury) — 





21 to 30 years of age 



122 



31 to 40 years of age 



127 



41 to 50 years of age 



130 



51 to 60 years of age 



132 



Table IV is intended to show a comparison of our systolic 

 readings with those of Chamberlain's (2) work on Filipinos and 

 Woley's(il) on Americans in the United States. It is evident 



