Secret Correspondence
To carry on a correspondence without the possibility of the meaning of the letter being detected, in case it should be opened by any other person, has employed the ingenuity of many. No method will be found more effectual for this purpose, or mor... Secret Correspondence By Music
Form a circle like Fig. 2, divided into twenty-six parts, with a letter of the alphabet written in each. The interior of the circle is moveable, like that in Fig. 1, and the circumference is to be ruled like music-paper. Place in each division a not... Several Different Cards Being Fixed On By Different Persons To Name
that on which each Person fixed. There must be as many different cards shown to each person, as there are cards to choose; so that, if there are three persons, you must show three cards to each person, telling the first to retain one in his memory.... Single Vertical Wheels There Are Different Sorts Of Vertical
wheels; some having their fells of a circular form, others of an hexagonal, octagonal, or decagonal form, or of any number of sides, according to the length of the cases you design for the wheel; the spokes being fixed in the nave, nail slips of tin, ... Singular Impression On The Visual Nerves By A Luminous Object
If, while sitting in a room, you look earnestly at the middle of a window, a little while, when the day is bright, and then shut your eyes, the figure of the window will still remain in your eye, and so distinct that you may count the panes. A remar... Sky-rockets
Rockets being of the fire-works most in use, we shall give them the preference in description. As the performance of rockets depends much upon their moulds, they should be made according to the following proportions:--Taking the diameter of the orif... Spiral Wheels They Are Only Double Horizontal Wheels And Made
thus: the nave must be about six inches long, and rather thicker than the single sort; instead of the pintle at top, make a hole for the case to be fixed in, and two sets of spokes, one set near the top of the nave, and the other near the bottom. At t... Spirits Ignited By Electricity
Hang a small ball with a stem to the prime conductor, so that the ball may project below the conductor. Then warm a little ardent spirit, by holding it a short time over a candle in a metallic spoon; hold the spoon about an inch below the ball, and ... Spur Fire
This fire is the most beautiful of any composition yet known. As it requires great trouble to bring it to perfection, particular care must be paid to the following instructions. They are made generally in cases about six inches long, but not driven ... Stands For Rockets Care Must Be Taken In Placing The Rockets
when they are to be fired, to give them a vertical direction at their first setting out; which may be managed thus: Have two rails of wood, of any length, supported at each end by a perpendicular leg, so that the rails may be horizontal, and let the d... Stars With Points
These stars are made of different sizes, according to the work for which they are intended; they are made with cases from one ounce to one pound, but in general with four-ounce cases, four or five inches long: the case must be rolled with paste, and... Subaqueous Exhalation
Pour a little clear water into a small glass tumbler, and put one or two small pieces of phosphoret of lime into it. In a short time, flashes of fire will dart from the surface of the water, and terminate in ringlets of smoke, which will ascend in r... Swans And Ducks In Water
If you would have swans or ducks discharge rockets into the water, they must be made hollow, and of paper, and filled with small water-rockets, with some blowing powder to throw them out; but if this is not done, they may be made of wood, which will... Table-rockets Table-rockets Are Designed Merely To Show The Truth
of driving, and the judgment of a fire-worker; they having no other effect, when fired, than spinning round in the same place where they began, till they are burnt out, and showing nothing more than a horizontal circle of fire. The method of making... The Aeolipiles
The aeolipile is a small hollow globe of brass, or other metal, in which a slender neck or pipe is inserted. This ball, when made red-hot, is cast into a vessel of water, which will rush into its cavity, then almost void of air. The ball being then ...

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