The Newmanry History

44B Page 321


The only hope left was that it might be possible to set messages by

An attempt was made early in i942 to set X's and PSI's for a message by

In another investigation, no attempt was made to use the periodicity of the

(i) All five PSI wheels have the same movement

frequent than continuation.

These properties, it was thought, could best be expressed in terms not of

At this time, as in March and April, 1942, the Germans always arranged that

But suppose, it was argued, that two impulses of the Delta-PSI' key, say the

2 ab ( 1 - b ) = 1 - b

It was deduced that the first step in any statistical method of wheel

All now depended an the properties of Delta-P1 + Delta-P2. Counts

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