THE RESULTANT PRESSURE RECORDER. 

 Fig. 1. 



23 



Ratio of the total normal pressure (P„) on an inclined square plane to the pressure (/><„) on 

 a normal plane, the planes moving in the air with the same velocity. 

 Abseis.sic. Angles of inclination («) of plane to horizon. 



p 

 Ordinates. £=F («) (expressed as a percentage). 



•'90 

 O Represents the mean of observed points for each angle of experiment. 



