The Transposable Pieces
Take two guineas and two shillings, and grind part of them away, on one side only, so that they may be but half the common thickness; and observe, that they must be quite thin at the edge; then rivet a guinea and a shilling together. Lay one of thes... The Travelling Of Light
Light travels at the rate of a hundred and fifty thousand miles in a single second; and it is seven minutes in passing from the sun to the earth, which is nearly a distance of seventy millions of miles. Such is the rapidity with which these rays dar... The Travelling Of Sound Experimentally Proved
There is probably no substance which is not in some measure a conductor of sound; but sound is much enfeebled by passing from one medium to another. If a man, stopping one of his ears with his finger, stop the other also by pressing it against the e... The Unconscious Incendiary
Let a person stand upon a stool made of baked wood, or upon a cake of wax, and hold a chain which communicates with the branch. On turning the wheel he will become electrified; his whole body forming part of the prime conductor; and he will emit spa... The Water Sun
Provide two portions of a hollow sphere, that are very shallow; join them together in such a manner that the hollow between them be very narrow. Fix them vertically to a pipe from whence a jet proceeds. Bore a number of small holes all around that p... Three Objects Discernible Only With Both Eyes
If you fix three pieces of paper against the wall of a room at equal distances, at the height of your eye, placing yourself directly before them, at a few yards' distance, and close your right eye, and look at them with your left, you will see only ... To Cast Figures In Imitation Of Ivory
Make isinglass and strong brandy into a paste, with powder of egg-shells, very finely ground. You may give it what colour you please; but cast it warm into your mould, which you previously oil over. Leave the figure in the mould till dry, and you wi... To Cause A Brilliant Explosion Under Water
Drop a piece of phosphorus, the size of a pea, into a tumbler of hot water; and, from a bladder furnished with a stop-cock, force a stream of oxygen directly upon it. This will afford a most brilliant combustion under water. ... To Change Blue To White
Dissolve copper filings in a phial of volatile alkali; when the phial is unstopped, the liquor will be blue; when stopped, it will be white. ... To Change The Cards Which Several Persons Have Drawn From The Pack
On the top of the pack put any card you please--suppose the queen of clubs; make the pass, bring that card to the middle of the pack, and offer it to a person to draw. Then, by cutting the cards, bring the queen again to the middle of the pack. Make... To Construct Paper Balloons
Take several sheets of silk paper; cut them in the shape of a spindle; or, to speak more familiarly, like the coverings of the sections of an orange; join these pieces together, into one spherical or globular body, and border the aperture with a rib... To Construct The Camera Obscura
Make a circular hole in the shutter of a window, from whence there is a prospect of some distance; in this hole place a magnifying glass, either double or single, whose focus is at the distance of five or six feet; no light must enter the room but t... To Discover The Card Which Is Drawn By The Throw Of A Die
Prepare a pack of cards, in which there are only six sorts of cards. Dispose these cards in such manner that each of the six different cards shall follow each other, and let the last of each suite be a long card. The cards being thus disposed, it fo... To Diversify The Colours Of Flowers
Fill a vessel of what size or shape you please, with good rich earth, which has been dried and sifted in the sun, then plant in the same a slip or branch of a plant bearing a white flower, (for such only can be tinged,) and use no other water to wat... To Draw Easily And Correctly A Landscape Or Any Other Object
without being obliged to observe the Rules of Perspective, and without the Aid of the Camera Obscura. Procure a box of pasteboard, A B C D, Fig. 13, of about a foot and a half long, and made in the shape of a truncated pyramid, whose base, B D F...

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

To Make Squibs And Serpents The Leech A Prognosticator Of The Weather To Load Air Balloons With Stars Serpents &c &c When You Fill To Give Silver-plate A Lustre To Find The Number Of Changes That May Be Rung On Twelve Bells To Show The Spots In The Sun's Disk By Its Image In The Camera To Represent Cascades Of Fire To Tell The Number Of Points On Three Cards Placed Under Three