ced 
E,(Hog285), and the sum of the first and second row then becomes 
E54 55:8,)- Finally, the complete sum is simply Bo ( HL og28 op) + 
Figure 19 illustrates this property of the net. The net as 
shown is not a very close one, but it is seen that if the indicated 
signs are assigned to each corner of the elemental areas of the 
grid system, and if the sum of all the terms is then taken, every 
value of En ( # 58) which occurs will be cancelled out by a term of 
opposite sign except the ones for E,(0,0), E5(0,95), E>(M 9,0) 
and Ej(f g,6,5)- The only one not zero of those that are not can- 
celled out is E,(H2,05)- 
The next step is to integrate over y and t and pass to the 
limit as L and T approach infinity. The only term remaining is 
48, ( fog )8oR) (See for example equation (6.64).) Then as Q5p 
approaches 1/2, the next expression is obtained. And as p# 28 
approaches infinity, /2 is obtained. Finally, the same re- 
Bo max 
sults hold as A,b and A,° approach zero. Therefore equation 
(9.24) is proved. 
The results hold for any value of xe Consequently, they hold 
for an average over x also. In other words, equation (9.24) and 
(9,25) could be modified by another integration from x* to x* + L* 
and a division by L*. Then the limits as i L, and L* approach | 
infinite would be the same as the limits as they are given. 
Some examples 
Various examples of the integration of equation (9.1) will 
now be described. These examples will all be examples of the non- 
Gaussian case. They are of interest because they show that all 
of the systems which were infinite in duration and width in the 
= Bales 
