Expériences et observations sur l'électricité faites à Philadelphie en Amérique

By Benjamin Franklin

Page 95

la foudre causant une répulsion
violente entre les particules du métal à travers duquel il passe, le
métal est mis en fusion.

132. Si vous vouliez fondre à un feu violent l'extrémité d'un clou à
demi-enfoncé dans une porte, la chaleur communiquée au clou entier,
avant d'en fondre une partie, brûleroit la planche où il est enfoncé, &
la partie fonduë brûleroit le plancher où elle tomberoit. Mais si la
foudre peut fondre une épée dans le fourreau & l'argent dans la bourse,
sans brûler ni le fourreau ni la bourse, il faut que la fusion soit
froide.

133. La foudre déchire quelques corps: l'étincelle électrique perce
aussi un trou à travers une main de gros papier. (§. 54.)

134. Si l'origine de la foudre assignée dans cette feüille est la
véritable, on entendroit fort peu de tonnerre en mer, lorsque l'on
seroit fort éloigné de la terre, & en effet quelques vieux Capitaines de
vaisseaux que l'on a consultés sur cet article, assurent que le fait
s'accorde parfaitement avec l'hypothèse. Parce qu'en traversant le vaste
Océan on n'entend guères le tonnerre qu'on ne soit arrivé près des côtes
dans des endroits où l'on peut se servir de la sonde, & que les isles
éloignées du continent y sont fort peu sujettes. Un observateur curieux
qui a vécu treize ans aux Bermudes, remarque qu'il y a eu moins de
tonnerre pendant tout le tems qu'il y a séjourné, qu'il n'en a
quelquefois entendu dans un mois à la Caroline.

Maintenant si le feu de l'électricité & celui de la foudre sont le même,
comme j'ai tâché de le prouver, notre conducteur de carton & les bassins
de l'expérience de la balance (78.) peuvent représenter les nuages
électrisés. Si un tube long seulement de dix pieds frappe & décharge son
feu sur le poinçon à deux ou trois pouces de distance, un nuage
électrisé qui est peut-être de dix mille acres, peut frapper & décharger
son feu sur la terre à une distance proportionnellement plus grande. Le
mouvement horizontal des bassins sur le plancher, peut représenter le
mouvement des nuages sur la terre, & le poinçon élevé, les montagnes &
les plus hauts édifices, & alors nous voyons comment les nuages
électrisés passant sur les montagnes & sur les bâtimens à une trop
grande hauteur pour les frapper, peuvent être attirés en bas jusques
dans la distance qui leur est nécessaire pour cet effet; & enfin si une
aiguille est fixée sur un poinçon, la pointe en haut, ou même sur le
plancher au-dessous du poinçon, elle tirera le feu du bassin en silence
à une distance beaucoup plus

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Text Comparison with Memoirs of Benjamin Franklin; Written by Himself. [Vol. 2 of 2] With his Most Interesting Essays, Letters, and Miscellaneous Writings; Familiar, Moral, Political, Economical, and Philosophical, Selected with Care from All His Published Productions, and Comprising Whatever Is Most Entertaining and Valuable to the General Reader

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42 On Luxury, Idleness, and Industry 45 On Truth and Falsehood 50 Necessary Hints to those that would be Rich 53 The Way to make Money plenty in every Man's Pocket 54 The Handsome and Deformed Leg 55 On Human Vanity 58 On Smuggling, and its various Species 62 Remarks concerning the Savages of North America 66 On Freedom of Speech and the Press 71 On the Price of Corn and the Management of the Poor 82 Singular Custom among the Americans, entitled Whitewashing .
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He that denies a vicious inclination, is virtuous in proportion to his resolution; but the most perfect virtue is above all temptation; such as the virtue.
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In general, mankind, since the improvement of cookery, eat about twice as much as nature requires.
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There are a great many retailers who falsely imagine that being _historical_ (the modern phrase for lying) is much for their advantage; and some of them have a saying, _that it is a pity lying is a sin, it is so useful in trade_; though if they would examine into the reason why a number of shopkeepers raise considerable estates, while others who have set out with better fortunes have become bankrupts, they would find that the former made up with truth, diligence, and probity, what they were deficient of in stock; while the latter have been found guilty of imposing on such customers as they found had no skill in the quality of their goods.
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As the city of London, in all ages, as well as the time we are now speaking of, was remarkable for its opposition to arbitrary power, the poets levelled all their artillery against the metropolis, in order to bring the citizens into contempt: an alderman was never introduced on the theatre but under the complicated character of a sneaking, canting hypocrite, a miser, and a cuckold; while the court-wits, with impunity, libelled the most valuable part of.
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This conscientious man is a Quaker.
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They are done by English and American merchants, who nevertheless complain of private theft, and hang by dozens the.
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"DEAREST SISTER JENNY, "I took your admonition very kindly, and was far from being offended at you for it.
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[20] Without too great expense.
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If these are the principles of your nation, no confidence can be placed in you; it is in vain to treat with you, and the wars can only end in being reduced to an utter inability of continuing them.
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Priestley, you tell me, continues his experiments with success.
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I hope soon to have more leisure, and to spend a part of it in those studies that are much more agreeable to me than political operations.
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"I am not acquainted with the saying of Alphonsus, which you allude to as a sanctification of your rigidity in refusing to allow me the plea of old age as an excuse for my want of exactness in correspondence.
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His lands are on navigable water, communicating with the Delaware, and but about 16 miles from this city.
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, the inflammable breath of the pyrites, which is a substantial sulphur, and takes fire of itself.
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in the plate_, forming a long and sharp cone.
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From thence I formed an idea of the cause of these storms, which I would explain by a familiar instance or two.
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, in a successive current, to which current our coast and inland ridge of mountains give the direction of northeast, as they lie N.
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And as much as possible to correct any little inequalities in my counting, I repeated the experiment a number of times at each depth of water, that I might take the medium.