68

66

graph, one of which is enclosed by every cut
that encloses the other, the former may be
erased, this process being termed deiteration.

Rule of Insignificants and the Pseudograph
A double cut enclosure can anywhere be inserted
and anywhere erased can be circumposed about
any graph or be removed from any
graph; and the area cont any enclosure containing
a vacant cut or other form of pseudograph
can be suppressed or inserted.

Now go to p 18