1210 
= 65 «= 
maximum in the plane of intersestion but decreases steadily and 
greatly es the charges are brought together, Outside the plane 
of intersection, on the other hand, the curves show maxima, again 
to be explained on the basis of the late arrival, for the smaller X 'g, 
of the wave from the more distant charge. 
Shielding of One Explosion by Bubble from Another, The gauge at 
-Z recorded the shock wave from the more distant charge as affected 
by the presence of the gas bubble from the nearer charge, The 
observed pressure was found to be 4 to 1/3 the value expected in 
the absence of "screening". Furthermore, the pulse arrived later 
than would have been the case without the screening. 
