1329 
10) has determined the "extreme-stationary" 
J. von Neumann 
contact by means of an asymptotic expansion for relatively 
strong shocks ( F ~ 0) in which terms like F are neglected, 
ay 1 Ti ‘ 
but not terms such as § " . It turns out that Foot. stat. 
must satisfy the following equations: 
+1 ‘z 2 ite : 
(F Tt ee) ee aE Tp 
PRR -1 (FF -1)(2 + ££ FF -2)+(1+2)} 
where f( f) = rhs 
2 vFEy at) 4 1 
BONE P(F mt) Bsn , z Fi 1_¢? 
ana = 7 =F 
¢ 7 (1-2) + (1+f) Fr §-1) 
for Y= 7.15 one obtains thus the asymptotic value (cf. Table 9) 
e 
0.0001435, F oi, 
-stat. = 16.595, 
47.46. The existence of 
5 extr.-stat. ™ 
@& cxtr.-stat. 1524, & 
such a contact for all yin the case of water=-like substances 
extre-stat. 
is still another respect in which these behave differently 
from the analogous ideal gases 1,5), 
As yet, there is not sufficient experimental evidence 
to direct the theoretical understanding of the region beyond 
the validity of "regular reflection", where the so-calied 
1,3) occurs. In this connection it is desirable 
Mach effect 
to consider as a first approximation the "simple" theory of 
three=-shock intersections. 
Sie Aulintes 
