Endless Amusement A Collection of Nearly 400 Entertaining Experiments in Various Branches of Science; Including Acoustics, Electricity, Magnetism, Arithmetic, Hydraulics, Mechanics, Chemistry, Hydrostatics, Optics; Wonders of the Air-Pump; All the Popular Tricks and Changes of the Cards, &c., &c. to Which is Added, a Complete System of Pyrotechny; Or, the Art of Making Fire-works.

Offer the long card to a person, that he may draw it, and replace it in any part of the pack he pleases. _Make the pass_, and bring that card to the top. Next divide the pack in...

Rockets for this purpose must be made with the greatest exactness, all rammed by the same hand, in the same mould, and filled with the same proportion of composition: and after...

CHARGE. lb. oz. lb. oz. Saltpetre 5 0 Saltpetre 5 0 Brimstone 1 0 Brimstone 2 0 Meal-powder 1-1/2 0 Meal-powder 1 8 Glass-dust 1 0 Glass-dust 1 8

This case being placed in the sun, the spirits will be rarefied by the heat, and, rising in the tube, will lift up the catch or trigger, and set the organ in play; which will co...

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 s...

If you place between two of these mirrors part of a fortification, as a curtain, and two demi-bastions, you will see an entire citadel with six bastions; or if you place part of...

Take a square bottle of thin glass, and of any size. Apply it to the hole of the air-pump, and exhaust the air. The bottle will sustain the weight of the external air as long as...

Dissolve copper filings in aqua fortis. When the copper has impregnated the acid, pour off the solution, and put into it some pieces of iron, or iron filings. The effect of this...

From the prime conductor of an electric machine suspend six concentric hoops of metal at different distances from each other, in such a manner as to represent in some measure th...

The whole company may be made to partake of the shock, by joining hands, and forming a circle. The experiment may also be varied if they tread upon each other's toes, or lay the...

Dissolve camphor in spirit of wine, and deposit the vessel containing the solution in a very close room, where the spirit of wine must be made to evaporate by strong and speedy...

This mixture, when rubbed too much, will be too fierce, and hardly show any stars; and, on the contrary, when not mixed enough, will be too weak, and throw out an obscure smoke,...

The double of the rank of the third person is 6 To which add 5 ____ 11 Multiply the sum by 5 ____ 55 To which add 10 And the number of the left hand 2 ____ 67 Which being multip...

Small ragged parts of clouds, suspended in the air between the great body of clouds and the earth, (like leaf gold in electrical experiments,) often serve as partial conductors...

Having prepared all the ships for fighting, we shall next proceed with the management of them when on the water. At one end of the pond, just under the surface of the water, fit...

Write any unimportant matter with common ink, and let the lines be very wide apart: then between these lines write the communication you wish to make, with any of the above invi...

Wand, magnetic 70 mercurial 79 Watch Dial, to tell by one the Hour when a Person intends to rise 17 mysterious 70 Lamp 140 Water gilding on Silver 43 which gives Silver a Gold C...

This great work, furnished at a remarkably cheap rate, contains about NINETEEN HUNDRED LARGE IMPERIAL PAGES, and is illustrated by EIGHTY-TWO SMALL MAPS, and a colored MAP OF TH...

Page Aces, the convertible 117 Æolipiles 60 Aigrettes 185 Air-pump 77 bottles broken by 77 glass broken by 77 hand fixed by 77 water boiled by 78 bubbles, vegetable 78 electrifi...

The "Treasury" contains upwards of four hundred Engravings; so that it is not only a collection of "secrets worth knowing," but it is a book of pictures, as full of prints as a...