8 Introduction. 



TABLE 8. Factors for reduction of saturated volumes to C. dry and 

 760 millimeters pressure. (1/1 + 0.00367 t) X (p-e/760) 

 t = temperature, p = pressure, e = pressure of aqueous vapor 

 at temperature t. 



The table is calculated in the same manner as table 7, except that 

 the factors themselves are used instead of the logarithms. The 

 table was actually constructed by reading the antilogarithms of 

 table 7. The top argument is in millimeters pressure that is, the 

 observed reading corrected for temperature. The side argument gives 

 the temperature t to 0.1 C. 



TABLE 9. Logarithms for reduction of volumes to 0C. and 760 

 millimeters pressure. (1/1+0.003670 X (p/760) 



The table is calculated by adding the logarithm of p/760 as found 

 in table 6, page 34. The barometric pressure p in this table is the 

 observed reading corrected to C. and t is the observed temperature. 

 No attention is paid to the condition of saturation. The table is 

 used in the reduction to C. and 760 millimeters pressure of volumes 

 of oxygen absorbed, measured with the portable respiration apparatus. 

 The top argument is in millimeters barometric pressure. The side 

 argument is in 0.1 C. 



TABLE 10. Factors for reduction of volumes to C. and 760 milli- 

 meters pressure. (1/1+0.00367 X (p/760) 



The table represents the products of the fraction 1/1 +0.00367 t t 

 where t equals the temperature, and the fraction p/760, where p equals 

 the barometric pressure corrected to C., but uncorrected for pres- 

 sure of aqueous vapor. The table was actually constructed by finding 

 the antilogarithms of table 9, page 71. It is used for the same purpose 

 as table 9, when calculations are carried out without the use of 

 logarithms. 



TABLE 11. Volumes of oxygen in incoming air corresponding to 100 

 volumes of outgoing air with different percentages of nitrogen. 

 79.03 : p. ct. N 2 : : 20.94 : x; where x equals volumes of 

 oxygen in incoming air. 



The table is calculated by means of the proportion indicated 

 above, the computation being carried out for all percentages of 

 nitrogen in outgoing air from 78.50 to 80.50 at intervals of 0.01 per 

 cent. The table is used in calculating the oxygen deficit of expired 

 ah* when the expired air is collected and analyzed for carbon dioxide 

 and oxygen. It is assumed that the inspired air has the same com- 

 position as outdoor ah*, namely, 20.94 per cent oxygen, 79.03 per cent 

 nitrogen, and 0.03 per cent carbon dioxide. The top argument is 



