When applied to the
machine it passes through the two laths, and is stopped by a knot in
its other end behind the longest at _k._ The hole at _i_ is nearer
the end of the arm than that at _k_, about an inch. A number of
knots are also on the cord, distant three or four inches from each
other.
To use this instrument; put one hand into the loop, and draw
the sinew straight down the side of the arm; then enter the end of
the finger between the book you would take down and that which is
next to it. The laths being flexible, you may easily by a slight
pressure sideways open them wider if the book is thick, or close them
if it is thin by pulling the string, so as to enter the shorter lath
or thumb between your book (Illustrations omitted) and that which is
next to its other side, then push till the back of your book comes to
touch the string. Then draw the string or sinew tight, which will
cause the thumb and finger to pinch the book strongly, so that you
may draw it out. As it leaves the other books, turn the instrument a
_quarter_ round, so that the book may lie flat and rest on its side
upon the under lath or finger.
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