522 
= 26.2 
TABLE 
SURFACE REFLECTION 
— 
Depth Feet 
Maximum Pressure 
recorded 
Direct Reflected 
los ./sq.in. 
8, 
Time 
difference 
of second 
calc. 
6. 
Length of 
path feet 
Reflected 
Negat ive 
Pressured 
Direct 
tg 
lbs ./sq.in. 
9. 
600 1bs, 
inde f- 
inite 
500 Ibs. 53 
indef- 
Inite 
100 lbs, 
(S.16) T.N.T. 
(17) 100 lbs. 23 
iN (S.22) T.N.T. 
(18) | G.4 | 15" 
| 250 Ibs. 6 ; from from 
TNs Te surface surface 
pinhead nt sent ean 
In al) cases (1) to (17) the actual values of tension must be regarded as approximate only. 
The value in (18) is fairly accurate, 
The conditions of reflection In these cases when the gauge is practically in the surface - 
are rendered uncertain by surface irregularities and the presence of the air floats near 
the gauge. The records indicate, however, a considerable drop in maximum pressure and 
momentum. 
6 The reflection in this case took place from the steed hull of H.M. Ship "Gorgon". 
A glance seveee 
