Henry Bushby Transcription pages
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of z, since z being given, the pre-
cise value of the arc can always be
determined if it is of any importance.
For illustration if the tube
is here bent
& one end
twisted through one arc 1 will join 3,
3 join 2, & 2 join 1 & z will be reduced
from 3 to 1. Twisted through two arcs
1 will join 2, 3 join 1, 2 join 3, & z
again is reduced from 3 to 1. But
if it is twisted through 3 arcs (=
z arcs [deleted: )] = 360[degrees]) 1 joins 1, 2 joins 2, 3 joins
3, & z remains 3.
It is of no importance that, twisted
the other way, 1 would join 2, 2 join 3 &c
Since the reverse will be formed & in any
case the same pairs join.
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