APPENDIX TO METEOROLOGICAL AND HYDROGRAPHIC TABLES. 



lie 



Table II A. Virtual temperature of saturated air in degrees centigrade, the pressure being given in 



millimeters of mercury. 



44 



12.9 



11.9 

 11. 1 

 10.4 



Pressure 631 mm. of mercury, temperature 



74 per cent of 0.9 gives 0.7 



Virtual temperature 3. 6 C 



Example. 

 9 C. Table 1 1 a gives 0.9. 



for air of 2.9 C. and 74 per cent relative humidity at the 

 pressure of 631 mm. 



