Another hole was bored in the bottom of the box large enough
to allow the waste water to run away freely. A belt, made from an
ordinary sash cord, was run from the small pulley on the
waterwheel to a large pulley, as shown in Fig. 1. A pitman was
attached to the large pulley, which operates the washing machine
by its reciprocating motion, and the length of the stroke is
adjusted by moving the position of the hinge joint on the arm of
the washing machine, as shown in Fig. 2. The pressure at the
nozzle is about 20 lb. per square inch, and is sufficient to drive
the waterwheel under all ordinary circumstances.
--Contributed by P. J. O'Gara, Auburn, Cal,
** An Optical Illusion [130]
When looking at the accompanying sketch you will say that the
letters are alternately inclined to the right and left. They are
not so and can be proved by measuring the distance of the top and
bottom of any vertical strokes from the edge of the entire block.
They will be found to be exactly the same distance. Or take any of
the horizontal strokes of the four letters and see how far their
extremities are from the top and bottom of the entire block.
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