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- Never-yielding Cement
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- A Water Which Gives Silver A Gold Colour
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- A Liquid That Shines In The Dark
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- To Make Squibs And Serpents
- The Leech A Prognosticator Of The Weather
- To Give Silver-plate A Lustre
- To Show The Spots In The Sun's Disk By Its Image In The Camera
- To Load Air Balloons With Stars Serpents &c &c When You Fill
- To Find The Number Of Changes That May Be Rung On Twelve Bells
- To Tell The Number Of Points On Three Cards Placed Under Three
- To Find The Difference Between Two Numbers The Greatest Of Which Is
- To Represent Cascades Of Fire
- To Make Any Number Divisible By Nine By Adding A Figure To It
- To Fill A Bladder With Hydrogen Gas
- To Make Several Rockets Rise Together Take Six Or Any Number Of
- To Melt Iron In A Moment And Make It Run Into Drops
- The Power Of Water When Reduced To Vapour By Heat
- To Tell How Many Cards A Person Takes Out Of A Pack And To Specify
- To So Fill A Glass With Water That It Cannot Be Removed Without
- 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



The Exploded Bladder








Take a glass pipe open at both ends, to one of which tie fast a wet
bladder, and let it dry. Then place it on the plate of the pump. While
the air presses the bladder equally on both sides, it will lie even
and straight; but as soon as the air is exhausted, it will press
inwards, and be quite concave on the upper side. In proportion as the
air is exhausted, the bladder will become more stretched; it will soon
yield to the incumbent pressure, and burst with a loud explosion. To
make this experiment more easy, one part of the bladder should be
scraped with a knife, and some of its external fibres taken off.





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