This type of battery will give
about 0.9 of a volt, and should be used on a circuit of about 100
milli-amperes.
** A Skidoo-Skidee Trick [116]
In a recent issue or Popular Mechanics an article on "The Turning
Card Puzzle" was described and illustrated. Outside of the
scientific side involved, herein I describe a much better trick.
About the time when the expression "skidoo" first began to be used
I Invented the following trick and
[Illustration: How to Cut the Notches]
called it "Skidoo" and "Skidee," which created much merriment.
Unless the trick is thoroughly understood, for some it will turn
one way, for others the opposite way, while for others it will not
revolve at all. One person whom I now recall became red in the
face by shouting skidoo and skidee at it, but the thing would not
move at all, and he finally from vexation threw the trick into the
fire and a new one had to be made. Very few can make it turn both
ways at will, and therein is the trick.
Take a piece of hardwood 3/8 in. square and about 9 in. long. On
one of the edges cut a series of notches as indicated in Fig.
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