The Revolutions Of The Heavenly Bodies Forming What Is Called The Electrical Orrery Let A Single Wire With The Extremities Point
and turned, be nicely balanced on a point; fix a small glass ball over
its centre to represent the sun. At one extremity of the wire, let a
small wire be soldered perpendicularly, and on this balance another
small wire with its ends pointed and turned, and having a small pith
ball in its centre, to represent the earth, and a smaller ball of the
same kind at one of the angles, for the moon. Let the whole be
supported upon a glass pillar, and be conducted by a chain proceeding
from the prime conductor to the wire supporting the glass ball. Now,
when the machine is put in motion, the wires will turn round, so that
the ball representing the earth will move round the central ball, and
the little ball at the angle of the smaller wire will at the same time
revolve about the earth.
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To Tell The Number Of Points On Three Cards Placed Under Three
different Parcels of Cards. You first premise that the ace counts for eleven; the court cards ten each; and the others according to the number of their pips. You then propose to any person in company to choose three cards, and to place over each as... To Tell The Number Of The Cards By Their Weight
Take a parcel of cards, suppose forty, among which insert two long cards; let the first be, for example, the fifteenth, and the other the twenty-sixth from the top. Seem to shuffle the cards, and then cutting them at the first long card, poise those... Two Figures One Of Which Blows Out And The Other Re-lights A
Candle. Make two figures, of any shape or materials you please; insert in the mouth of one a small tube, at the end of which is a piece of phosphorus, and in the mouth of the other a tube containing at the end a few grains of gunpowder; taking care... Two Inodorous Bodies Become Very Pungent And Odorous By Mixture
When equal parts of muriate of ammonia and unslaked lime, both substances destitute of odour, are intimately blended together in a mortar, a very pungent gas (ammonia) becomes evolved. ... Vegetable Air-bubbles
Put a small branch of the tree with its leaves, or part of a small plant, in a vessel of water, and, placing the vessel in the receiver, exhaust the air. When the pressure of the external air is taken off, the spring of that contained in the air-... Water Boiled By Air
Take water made so warm that you can just bear your hand in it, but that has not been boiled; put it under the receiver, and exhaust the air. Bubbles of air will soon be seen to rise, at first very small, but presently become larger, and will be at ... Water Colder Than Ice
Put a lump of ice into an equal quantity of water, heated to 176 degrees, the result will be, that the fluid will be no hotter than water just beginning to freeze; but if a little sea salt be added to the water, and it be heated only to 166 or 170, ... Water Fire-fountains
To make a fire-fountain for the water, first have a float made of wood, three feet diameter; then in the middle fix a round perpendicular post, four feet high, and two inches diameter; round this post fix three circular wheels made of thin wood, wit... Water-gilding Upon Silver
Take copper-flakes, on which pour strong vinegar; add alum and salt in equal quantities; set them on a fire, and when the vinegar is boiled, till it becomes one-fourth part of its original quantity, throw into it the metal you design to gild, and it... Water-mines
For water-mines you must have a bowl with a wheel on it, made in the same manner as the water-wheel; only in its middle there must be a hole, of the same diameter as that of the intended mine. These mines are tin pots, with strong bottoms, and a lit... Water-rockets
They may be made from four ounces to two pounds. If larger, they are too heavy; so that it will be difficult to make them keep above water without a cork float, which must be tied to the neck of the case; but the rockets will not dive so well with a... Weather Table
--------------------+---------------------+------------------------ NEW AND FULL MOON. SUMMER. WINTER. --------------------+---------------------+------------------------ If the new or full m... White Ink For Writing On Black Paper
Having carefully washed some egg-shells, remove the internal skin, and grind them on a piece of porphyry. Then put the powder into a small vessel of pure water, and when it has settled at the bottom, draw off the water, and dry the powder in the sun... Winter Changed To Spring
Take a print that represents winter, and colour those parts which should appear green, with the second green invisible ink, described in page 25; observing, of course, the usual rules of perspective, by making the near parts deeper in colour than th... Withered Fruit Restored
Take a shrivelled apple, and, placing it under the receiver, exhaust the air. The apple will immediately be plumped up, and look as fresh as when first gathered: for this reason, that the pressure of the external air being taken off, the air in the ... Wonderful Nature Of Lightning
If two persons, standing in a room, looking different ways, and a loud clap of thunder, accompanied with zigzag lightning, happen, they will both distinctly see the flash at the same time; not only the illumination, but the very form of the lightnin... Writing On Glass By The Rays Of The Sun
Dissolve chalk in aqua fortis, to the consistence of milk, and add to that a strong solution of silver. Keep this liquor in a glass decanter well stopped. Then cut out from a paper the letters you would have appear, and paste the paper on the decant... Snap But In The Great Operations Of Nature The Light Is What We Call Lightning And The Sound Produced At The Same Time Though
generally arriving later at our ears than the light does in our eyes) is, with its echoes, called thunder. If the communication of this fluid be by a conductor, it may be without either light or sound, the subtle fluid passing in the substance of t... The Alteration As The A Into D The C Into A E D G O Or Q The I Into B D Or L The L Into T The O
into a, d, g, or q; the v into y, &c. Take a parcel of cards, suppose twenty, and on one of them write with juice of lemon or onion, or vitriol and water, the word law, (these letters should not be joined;) and on the other, with the same ink, the ... The Revolutions Of The Heavenly Bodies Forming What Is Called The Electrical Orrery Let A Single Wire With The Extremities Point
and turned, be nicely balanced on a point; fix a small glass ball over its centre to represent the sun. At one extremity of the wire, let a small wire be soldered perpendicularly, and on this balance another small wire with its ends pointed and turned... Them Before The Fire As If To Dry The Names Just Written The Word Law Will Presently Change Into Old Woman
... 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
raised up and let down by the cord coming through the outside of the box. On this glass, the spectre, (or any other figure you please,) must be painted in a contracted or equal form, as the figure will reflect a greater length than it is drawn. Whe... Visible Now You Will Observe That By Altering The A In The Word Law Into D And Adding O Before The L And Oman After The W It Bec
the invisible ink, and let it remain so. On the rest of the cards you write any words you think fit. Present the cards in such manner to two persons, that one of them shall draw the word law, and the other the words old woman. You then tell the per...