The upper
end is supported by using a rope in the form of a loop or bail, as
shown in Fig. 2. The middle of the loop or bail should be about 15
in. from the end piece of the chair. Another rope is attached to
the loop and through the hook and to a slide as shown. This will
allow for adjustment to make the device into a chair or a hammock.
--Contributed by Earl R. Hastings, Corinth, Vt.
** How to Find the Blind Spot in the Eye [129]
Make a small black circular dot 1/2 in. in diameter on a piece of
cardboard and about 3 in. from the center of this dot draw a star.
Hold the cardboard so that the star will be directly in front of
one eye, while the dot will be in front of the other. If the star
is in front of the left eye, close the right eye and look steadily
at the star while you move the cardboard until the point is
reached where the dot disappears. This will prove the presence of
a blind spot in a person's eye. The other eye can be given the
same experiment by turning the cardboard end for end. The blind
spot does not indicate diseased eyes, but it simply marks the
point where the optic nerve enters the eyeball, which point is not
provided with the necessary visual end organs of the sight, known
as rods and cones.
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