314 
nD 
plifications are these: 
a) The number of molecules © N("Loschmidt's number" for a mol of 
substance) is "scaled down" from its actual value ~ |IC ay to sizes of 
(Om to [OO 
b) The intramolecular forces are correspondingly "scaled up" so as 
to approximate the correct hydrodynamical situation. 
c) The intramolecular forces are essentially simplified in various 
other respects. 
C. The envisaged computations appear to be well suited to be effi- 
ciently carried out on punch-card equipment. The use of such equipment was 
made available for the exploration of certain problems of this type by the 
Ballistic Research Laboratory of the Ordnance Research Center, Aberdeen, 
Maryland. A number of these problems have already been solved, under the 
direction of Mr. L. E, Cunningham of that laboratory. Among these three 
"experimental" problems are discussed in this report. They lead to very 
encouraging results. 
Specifically: In one-dimensional shock problems values of N-~ 14 
or 29 (that is, 14 to 29 "molecules") and a At about one-half of its maxi- 
mum allowable value (for details cf. section 18) produced results of highly 
satisfactory precision. The duration of the computations, including their 
setting up, was very reasonable. 
D. The report contains an analysis of these computations, and of 
the main viewpoints in connection with further computations of this type. 
Physical aspects of the problems, like the hydrodynamical theory of the prop- 
agation of disturbances (sound) and the conservation of the total energy as 
well as its partial "degradation" by shoeks, play an important role in dis- 
covering errors and keeping the equipment under control. 
