The Complete Works in Philosophy, Politics and Morals of the late Dr. Benjamin Franklin, Vol. 2 [of 3]

By Benjamin Franklin

Page 6


On the art of swimming 206

On the same subject, in answer to some enquiries of M. Dubourg 210

On the free use of air 213

On the causes of colds 214

Dr. Stark, and Dr. Letsom 215

Number of deaths in Philadelphia by inoculation ibid

Answer to the preceding 217

On the effects of lead upon the human constitution 219

Observations on the prevailing doctrines of life and death 222

An account of the new-invented Pensylvanian fire-places 225

On the causes and cure of smoky chimneys

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Text Comparison with Experiments and Observations on Electricity Made at Philadelphia in America

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(This is best done by a vinegar cruet, or some such belly'd bottle).
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Tho', as in EXPER.
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If they touch while electrising, the equality is never destroy'd, the fire only circulating.
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So a strait spring (tho' the comparison does not agree in every particular) when forcibly bent, must, to restore itself, contract that side which in the bending was extended, and extend that which was contracted; if either of these two operations be hindered, the other cannot be done.
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Common fire joined with air, increases the repulsion, enlarges the triangles, and thereby makes the air specifically lighter.
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So do the flashes of lightning; the clouds being very irregular bodies.
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has the line A, E, for its basis.
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the punch; or if in its course it would have come nigh enough to strike, yet being first deprived of its fire it cannot, and the punch is thereby secured from the stroke.
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_Hales_'s account of the thunder storm at _Stretham_, the effect of the lightning in stripping off all the paint that had covered a gilt moulding of a pannel of wainscot, without hurting the rest of the paint, I had a mind to lay a coat of paint over the filleting of gold on the cover of a book, and try the effect of a strong electrical flash sent through that gold from a charged sheet of glass.
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Cut a piece of _Dutch_ gold (which is fittest for these experiments on account of its greater strength) into the form of FIG.
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Its pores are filled with it as full as the mutual repellency of the particles will admit; and what is already in, refuses, or strongly repels, any additional quantity.
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Now the departing fire leaving a vacuum, as aforesaid, between these pores, which air nor water are fine enough to enter and fill, the electrical fluid (which is every where ready in what we call the non-electrics, and in the non-electric Mixtures that are in the air,) is attracted in: yet does not become fixed with the substance of the glass, but subsists there as water in a porous stone, retained only by the attraction of the fixed parts, itself still loose and a fluid.
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Thus the particles of electrical fluid belonging to the inside surface go in and out of their pores every stroke given to the tube.
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Hence we see the.
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The ends of the two chains in the glass were near an inch distant from each other, the oil of turpentine between.
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I shall only add, that as it has been observed here that spirits will fire by the electrical spark in the summer time, without heating them, when _Fahrenheit_'s thermometer is above 70; so, when colder, if the operator puts a small flat bottle of spirits in his bosom, or a close pocket, with the spoon, some little time before he uses them, the heat of his body will communicate warmth more than sufficient for the purpose.
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their Tails and Atmospheres accounted for.