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

By Benjamin Franklin

Page 98

vous
puissiez avoir une petite partie qui déborde à chaque extrémité du
verre: attachez ensemble les deux piéces de verre d'un bout à l'autre
avec un bon fil de soye: alors placez-les de manière qu'elles fassent
partie d'un cercle électrique, les extrémités de l'or qui pendent au
dehors servant à faire l'union avec les autres parties du cercle: portez
le coup au travers par le moyen d'un grand vase ou d'un carreau de verre
électrisé. Si vos lames de verre demeurent entières, vous verrez que
l'or manque en plusieurs endroits, & vous trouverez à la place des
taches métalliques sur les deux verres. Ces taches sur le verre
supérieur & sur le verre inférieur sont éxactement semblables jusques
dans le moindre trait, comme on le peut distinguer en les tenant à la
lumière. Le métal nous a paru avoir été non-seulement fondu, mais même
vitrifié ou autrement, si enfoncé dans les pores du verre qu'ils
paroissent le défendre contre l'action de la plus puissante eau forte &
eau régale. Je vous envoye dans une boëte deux petites piéces de verre
couvertes de ces taches métalliques, lesquelles ne peuvent être effacées
sans enlever une partie du verre. Quelquefois la tache s'étend un peu
plus que la largeur de la feuille, & paroît plus brillante sur le bord,
comme vous pouvez l'observer sur celles-ci en les examinant de près.
Quelquefois le verre se brise en morceaux; une fois le verre de dessus
se cassa en mille piéces qui paroissoient comme des grains de gros sel.
Ces morceaux que je vous envoye, ont été tachetés avec l'or d'Hollande;
le vrai or fait une tache plus obscure & un peu rougeâtre, l'argent fait
la tache verdâtre. Nous prîmes une fois deux morceaux de verre de miroir
fort épais, larges d'environ un pouce & demi & longs de six pouces, &
plaçant la feuille d'or entr'eux, nous les mîmes entre deux piéces de
bois bien uni, nous les serrâmes dans une petite presse de relieur de
livres, & quoiqu'ainsi serrées l'une contre l'autre, la force du choc
électrique brisa le verre en plusieurs morceaux.... l'or fut fondu & fit
des taches dans le verre à l'ordinaire. Les circonstances de ce
brisement de verre varient beaucoup en faisant l'expérience, &
quelquefois même le verre n'est point du tout brisé; mais il est
constant que les taches des morceaux de dessus & de dessous sont
exactement des contre parties les unes des autres. Et quoique j'aie pris
les morceaux de verre entre mes doigts immédiatement après la fusion, je
n'y ai jamais senti la moindre chaleur.

139. J'ai dit dans une de mes précédentes

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

Page 18
_ Some colonies have annual assemblies, some continue during a governor's pleasure; three years was thought a reasonable medium, as affording a new member time to improve himself in the business, and to act after such improvement; and yet giving opportunities, frequent enough, to change him, if he has misbehaved.
Page 35
FRANKLIN.
Page 40
Such settlements may better be made now, than fifty years hence, because it is easier to settle ourselves, and thereby prevent the French settling there as they seem now to intend, than to remove them when strongly settled.
Page 51
The government of William Markham, Esq.
Page 62
A remonstrance voted.
Page 65
"_ This the remarker seems to think right, when the question relates to "_Canada, properly so called_; it having never been mentioned as one of those objects, in any of our memorials or declarations, or in any national or public act whatsoever.
Page 78
--The human body and the political differ in this; that the first is limited by nature to a certain stature, which, when attained, it cannot ordinarily exceed: the other, by better government and more prudent police, as well as by change of manners and other circumstances, often takes fresh starts of growth, after being long at a stand; and may add tenfold to the dimensions it had for ages been confined to.
Page 93
Had we all the Caribbees, it is true, they would in those parts be without shelter.
Page 98
[33] Remarks, p.
Page 112
1.
Page 140
And his majesty, if he should take the trouble of looking over our disputes (to which the petitioners, to save themselves a little pains, modestly and decently refer him) where will he, for twenty years past, find any but _proprietary_ disputes concerning proprietary interests; or disputes that have been connected with and arose from them? The petition proceeds to assure his majesty, "that this province (except from the Indian ravages) enjoys the _most perfect internal tranquillity_!"--Amazing! what! the most perfect tranquillity! when there have been three atrocious riots within a few months! when in two of them, horrid murders were committed on twenty innocent persons; and in the third, no less than one hundred and forty like murders were meditated, and declared to be intended, with as many more as should be occasioned by any opposition! when we know that these rioters and murderers have none of them been punished, have never been prosecuted, have not even been apprehended! when we are frequently told, that they intend still to execute their purposes, as soon as the protection of the king's forces is withdrawn! Is our tranquillity more perfect now, than it was between the first riot and the second, or between the second and the third? And why "except the Indian ravages," is a _little intermission_ to be denominated "the most perfect tranquillity?" For the Indians too have been quiet lately.
Page 193
_ But must not he pay an additional postage for the distance to such inland town? _A.
Page 206
offensive duties in part will answer no end to this country; the commerce will remain obstructed, and the Americans go on with their schemes of frugality, industry, and manufactures, to their own great advantage.
Page 222
Meanwhile it is said the duties have so diminished, that the whole remittance of the last year amounted to no more than the pitiful sum of 85_l.
Page 254
Long did I endeavour, with unfeigned and unwearied zeal, to preserve from breaking that fine and noble porcelaine vase----the British empire; for I knew that being once broken, the separate parts could not retain even their _share_ of the strength and value that existed in the whole; and that a perfect _re-union_ of those parts could scarce ever be hoped for.
Page 277
The manufacture of silk, they say, is natural in France, as that of cloth in England, because each country produces in plenty the first material: but if England will have a manufacture of silk as well as that of cloth, and France of cloth as well as that of silk, these unnatural operations must be supported by mutual prohibitions, or high duties on the importation of each other's goods; by which means the workmen are enabled to tax the home consumer by greater prices, while the higher wages they receive makes them neither happier nor richer, since they only drink more and work less.
Page 300
---- finds himself concerned so warmly to accuse and condemn me, as he has done in Keimer's last Instructor, I cannot forbear endeavouring to say something in my own defence, from one of the worst of characters that could be given me by a man of worth.
Page 326
In my opinion, we might all draw more good from it than we do, and suffer less evil, if we would but take care not to give too much for _whistles_.
Page 343
Happy people! thought I, you live.
Page 344
What now avails all my toil and labour, in amassing honey-dew on this leaf, which I cannot live to enjoy! What the political struggles I have been engaged in, for the good of my com-patriot inhabitants of this bush, or my philosophical studies, for the benefit of our race in general! for in politics (what can laws do without morals?) our present race of ephemeræ will in a course of minutes become corrupt, like those of other and older bushes, and consequently as wretched: and in philosophy how small our progress! Alas! art is long, and life is short! My friends would comfort me with the idea of a name, they say, I shall leave behind me; and they tell me, I have lived long enough to nature and to glory.