944 
Se 
theory and experiment Is the fact that close to the charge the shocx wave is by no m2ans 
spherical as assumed in the thecry but concentrated along the colar axis ana equatorial plane 
cf the charge, possibly giving pressures in both of tnese directions higher than if the wave 
had been uniform 
TABLE 1. 
WATER AT 20° TO AIR AT 20° WATER AT 20° TO AIR AT 0° 
Water Shock Surface Vel, of hir Water Shock | Surface Vel. of 
vel. air shock shock vel. air shock 
atmos— 
tons/sq.in. ft./sec. | ft./sec. soheres tons/sq.in. | ft./sec. ft./sec. 
References. 
(1) Note on the water formation produced by an underwater explosicn on the Model Scale. 
by A.J. Harris, 
(2) M2asurement of the shock wave velocity in air above a water surface, due to the 
detonation of a submerged charge. by D. Croney and R.d. Davis. 
(3) Pressure time curves for Submarine "xplosions. by wW.G. Penney and HK. Dasgupta. 
