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- Never-yielding Cement
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- The Leech A Prognosticator Of The Weather
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- To Find The Difference Between Two Numbers The Greatest Of Which Is
- To Find The Number Of Changes That May Be Rung On Twelve Bells
- To Make Any Number Divisible By Nine By Adding A Figure To It
- To Tell The Number Of Points On Three Cards Placed Under Three
- To Represent Cascades Of Fire
- To Fill A Bladder With Hydrogen Gas
- To Make Several Rockets Rise Together Take Six Or Any Number Of
- To So Fill A Glass With Water That It Cannot Be Removed Without
- To Melt Iron In A Moment And Make It Run Into Drops
- There Must Also Be A Glass Planned To Rise Up And Down In The Groove A B And So Managed By A Cord And Pulley C D E F That It May
- To Extract The Silver Out Of A Ring That Is Thick Gilded So That The
- To Tell How Many Cards A Person Takes Out Of A Pack And To Specify



The Magical Cascade








Procure a tin vessel, shaped like Fig. 5, about five inches high and
four in diameter, with a cover, C, closed at top. To the bottom of
this vessel, let the pipe D E be soldered. This pipe is to be ten
inches long, and half an inch in diameter, open at each end, and the
upper end must be above the water in the vessel. To the bottom also
fix five or six small tubes, F, about one-eighth of an inch in
diameter. By these pipes, the water in the vessel is to run slowly
out.



Place this machine in a tin basin, G H, with a hole in the middle,
about a quarter of an inch in diameter. Fix to the tube D E, any sort
of ornament that will keep the machine firm on the basin, observing,
that these supports are sufficiently long to leave about a quarter of
an inch between the end of the tube and the orifice in the basin; and
let there be a vessel under the basin to catch the water that runs
out.

As the small pipes discharge more water into the basin than can run
out of the central orifice, the water will rise in the basin above the
lower end of the pipe, and prevent the air from getting into the
vessel, by which the water will cease to flow from the small pipes.
But as the water continues to flow from the basin, the air will have
liberty again to enter the vessel by the tube, and the water will
again flow from the small pipes, and alternately stop and flow, while
any water remains in the vessel.

As you can guess when the pipes will flow, and when they will stop,
you may so manage it, that they will appear to act by word of command.





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Previous: The Water Sun



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