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Henry Bushby Transcription pages

VM533B94v3-p227.jpg

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227


[diagram] the figure here given
a b is an ^axial turn*, bc being
the width of a strand. In the case of
a hawser each strand is divided from
its own part by two others, and by
remembering this it is easy to identify
a strand in any part of the rope.
A rope cannot be lengthened by
this process for an exact number of
^axial turns, because if this were attempted
the final lay would not be correct.
But it may be lengthened any num-
ber of ^axial turns less the width of one
strand. Therefor if the required additional
length is x inches, feet &c. calculate this
in ^axial turns as nearly as possible, and
take a turn less rather than more
as the rope is likely to stretch slightly
however well the process is carried out.
Suppose x to be equivalent to
about 4 ^such turns = 12 strand widths. Then
the actual additional length obtained

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