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- Never-yielding Cement
- Aigrettes
- Composition I Saltpetre Two Ounces Flour Of Sulphur One Ounce
- The Three Magical Parties
- Chemical Illuminations
- The Deforming Mirrors
- A Water Which Gives Silver A Gold Colour
- Bottles Broken By Air
- Of Gunpowder &c
- A Liquid That Shines In The Dark
- Invisible Ink
- Another
- A Lamp That Will Burn Twelve Months Without Replenishing
- A More Powerful Fulminating Powder
- Another Way
- Inflammable Phosphorus
- Another Way

Least Viewed

- 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



Contrivance For A Watch Lamp Perfectly Safe Which Will Show The








Hour of the Night, without any trouble, to a person lying in Bed.

It consists of a stand, with three claws, the pillar of which is made
hollow, for the purpose of receiving a water candlestick of an inch
diameter. On the top of the pillar, by means of two hinges and a bolt,
is fixed on a small proportionate table, a box of six sides, lined
with brass, tin, or any shining metal, nine inches deep, and six
inches in diameter. In the centre of one of these sides is fixed a
lens, double convex, of at least three inches and a half diameter. The
centre of the side directly opposite to the lens is perforated so as
to receive the dial-plate of the watch, the body of which is confined
on the outside, by means of a hollow slide. When the box is lighted by
a common watch-light, the figures are magnified nearly to the size of
those of an ordinary clock.





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