338 
26 
smallest v. This is clearly the \ behind the shock, hence by (A) above 
Vz 0.755) 0, TOU and so ————-—— _ 1,26, ! 5 “thus 
the requirement of (37) is t < 1.26, |, |5 and therefore 7 = 0.5 
would seem to be a safe value. 
We can now state the three problems for which the solutions were 
computed: 
Probleml: Qj =0,2, i.e. the first choice of §17. Q = 15, 
i.e. N = a,-t = 4 molecules". <= 9. 5.) Walcullation carried 
tite SS coll i awe. tee oles De 
Problem 2: Same as Problem 1, but T=0.45 (as a check), 
calculation carried until $ = Bly Gee Gg ee ePRUS, 
i 
Problem 3: & = O.4, i.e. the second choice of §17. 45: 30} 
ices MN = a@,—( = 4% molecules". t = 0,5, calculation carried 
Bite S= Gl tise. = = 50.5. 
As pointed out at the beginningsof §§15 and 16, the computations 
were carried out on the punch-card equipment of the Ballistic Research Lab- 
oratory at Aberdeen, Maryland. They produced very encouraging results. 
Such difficulties as presented themselves were all overcome by the very 
complete and efficient punch-card equipment of the Ballistic Research Labora- 
tory under the direction of Mr. Cunningham. The actual computations on 
each problem required 6-12 working hours net, and the entire program (setting 
up, etc.), insofar as these three problems were concerned, took less than tan 
days. 
A detailed analysis of the numerical material obtained was under- 
taken, and it gave very valuable pointers for the further development of this 
method. It will not be attempted to give here a detailed account of this 
analysis. We shall, however, point out some of the main features, and at- 
tach some graphical representations. 
