Dancing Balls
Take a common tumbler or glass jar, and having placed a brass ball in
one of the holes of the prime conductor, set the machine in motion,
and let the balls touch the inside of the tumbler; while the ball
touches only one point, no more of the surface of the glass will be
electrified, but by moving the tumblers about, so as to make the ball
touch many points successively, all the points will be electrified, as
will appear by turning down the tumbler over a number of pith or cork
balls placed on a table. These balls will immediately begin to fly
about.
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Bottles Broken By Air
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 it is able, but at length it will suddenly burst into very small partic... Caduceous Rockets They Are Such As In Rising Form Two Spiral
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Put into a middling-sized bottle, with a short wide neck, three ounces of oil or spirit of vitriol, with twelve ounces of common water, and throw into it, at different times, an ounce or two of iron filings. A violent commotion will then take place,... Chinese Fountains
To make a Chinese fountain, you must have a perpendicular piece of wood, seven feet long, and two inches and a half square. Sixteen inches from the top, fix on the front a cross piece one inch thick, and two and a half broad, with the broad side upw... Composition I Saltpetre Two Ounces Flour Of Sulphur One Ounce
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Let a large piece of cork be pendent from one end of a balance beam, and a small piece of lead from the other; the lead should rather preponderate. If this apparatus be placed under a receiver on the pump, you will find that when the air is exhauste... Curious Account Of The Electric Effects Of A Russian Climate
Mr. AEpinus in a letter to Dr. Guthrie, relates the following phenomena, which took place in Russia, when a severe frost had continued for several weeks. Mr. AEpinus was sent for to the palace to see an uncommon phenomenon. On going into the apar... Curious Effects Of Oil Upon Water And Water Upon Oil
Fasten a piece of pack-thread round a tumbler, with strings of the same from each side, meeting above it in a knot at about a foot distance from the top of the tumbler. Then putting in as much water as will fill about one-third part of the tumbler, ... Curious Experiment On Rays Of Light
That the rays of light flow in all directions from different bodies, without interrupting one another, is plain from the following experiment:--Make a little hole in a thin plate of metal, and set the plate upright on a table, facing a row of lighte... Curious Experiment With A Glass Of Water
Saturate a certain quantity of water in a moderate heat, with three ounces of sugar; and when it will no longer receive that, there is still room in it for two ounces of salt of tartar, and after that for an ounce and a drachm of green vitriol, near... Curious Experiment With A Tulip
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Put half a table-spoonful of syrup of violets and three table-spoonfuls of water into a glass; stir them well together with a stick, and put half the mixture into another glass. If you add a few drops of acid of vitriol into one of the glasses and s... Dancing Balls
Take a common tumbler or glass jar, and having placed a brass ball in one of the holes of the prime conductor, set the machine in motion, and let the balls touch the inside of the tumbler; while the ball touches only one point, no more of the surfac... Decorations For Sky-rockets Sky-rockets May Be Decorated According
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Construct a machine similar to that in Fig. 25. Its effect will be, that a print, or an ornamented drawing, with any object, such as an ace of diamonds, &c. in the centre F, will be seen as an ace of clubs when placed in the machine, and viewed thro... Double Spiral Wheels For These Wheels The Block Or Nave Must Be
as long as the height of the worms, or spiral lines, but must be made very thin, and as light as possible. In this block must be fixed several spokes, which must diminish in length, from the wheel to the top, so as not to exceed the surface of a cone ... Easy And Curious Methods Of Foretelling Rainy Or Fine Weather
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A very simple rain gauge, and one which will answer all practical purposes, consists of a copper funnel the area of whose opening is exactly ten square inches: this funnel is fixed in a bottle, and the quantity of rain caught is ascertained by multi... Easy Method Of Obtaining Flowers Of Different Colours From The Same
Stem. Scoop out the pith from a small twig of elder, and having split it lengthwise, fill each of the parts with small seeds that produce flowers of different colours, but that blossom nearly at the same time. Surround them with earth; and then tyi... Electrified Air
Fix two or three pointed needles into the prime conductor of an electrical machine, and set the glass in motion so as to keep the prime conductor electrified for several minutes. If now, an electometer be brought within the air that is contiguous to... Example Suppose The Person Wishes His Card To Be The Twentieth
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