2. FACTORS FOR CONVERSION OF GAS VOLUMES 

 FROM ATPS TO BTPS CONDITIONS 

 ATPS = At Ambient Temperature and atmospheric Pressure, 

 completely Saturated with water vapor. BTPS = At ^ody 

 Temperature (370C) and atmospheric Pressure, completely 

 Saturated with water vapor. Atmospheric pressure is 

 assumed to be standard (760 mm Hg). It is unnecessary to 

 correct for small deviations from standard barometric 

 pressure. For additional information on these concepts see 

 Page 1. 



3. TEMPERATURE AT VARIOUS ALTITUDES 

 U. S. standard atmosphere. 



Reference : Comroe, J. H., Jr., "Methods in Medical 

 Research," vol 2, pp 74-244, Chicago: The Year Book 

 Publishers, Inc., 1950. 



Contributor : Haber, F. 



References : [ l] Willis, R. G., National Advisory 

 Committee For Aeronautics, Tech. Rept. No. 147, 

 1922. [2] Diehl, W. S., National Advisory Commit- 

 tee For Aeronautics, Tech. Rept. No. 218, 19^5. 

 [3] Bromdracher, W. G., National Advisory Com- 

 mittee For Aeronautics, Tech. Rept. No. 538, 1935. 

 [4] Warfield, C. N., National Advisory Committee 

 For Aeronautics, Tech. Rept. No. 1235, Tech. Note 

 1200, 1947. 



4. ALTITUDE VS ATMOSPHERIC PRESSURE, 



O2 PARTIAL PRESSURE, AND AIR DENSITY 



/I/ Atmospheres. Ill Absolute pressure, Ib/sq in. /3/ Pressure at given altitude vs pressure at sea level. 

 /4/ Density at given altitude vs density at sea level. 



Contributors : (a) Haber, F., (b) ZoBell, C. E. 



Referenc es: ( 1] Willis, R. G., National Advisory Committee for Aeronautics, Tech. Rept. No. 147, 1922. ( 2] Diehl, 

 W. S., National Advisory Committee for Aeronautics, Tech. Rept. No. 218, 1925. [3] Bromdracher, W. G., National 

 Advisory Committee for Aeronautics, Tech. Rept. No. 538, 1935. [4] Warfield, C. N., National Advisory Com- 

 mittee for Aeronautics. Tech. Rept. No. 1235. Tech. Note 1200, 1947. 



