270 Air Resistance to Projectiles at High Velocities. 



FIG. 3. 



O 



Q tO (Q *T 



10 cvj N OJ 















oo 10 







x 



X 



1 



X s 



\ 





\ 



^1 





-J 



Vj 



St. 3 





O O o 



* M N :: o 



I % 



O 

 cO M - 



'ff 



The pressure in question is fl+2 t V- 1 , where a is the 



velocity of sound, but the curve represented by this function and the 

 curve of actual resistance do not even tend to approximate. 



