File:Mémoires sur l'électricité et la magnétisme (1789) (14804435403).jpg

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Identifier: mmoiressurllectr00coul (find matches)
Title: Mémoires sur l'électricité et la magnétisme
Year: 1789 (1780s)
Authors: Coulomb, C. A. (Charles Augustin), 1736-1806 Fossier, ill Le Gouaz, Yves-Marie, 1742-1816, engraver Adam, engraver Burndy Library, donor. DSI Académie royale des sciences (France)
Subjects: Electricity Magnetism
Publisher: Paris : Chez Bachelier, libraire ...
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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e fuipendue horizontalement, la ré-pulfion eft preique nulle. Lon trouvera la même chofepour lattraétion des pôles du même nom ; mais il fautavertir que pour compter fur le réfultat dune pareilleexpérience, il ne faut employer que des aiguilles fortementtrempées Se dexcellent acier, & ne pas leur donner inxtrop fort degré de magnétifme; autrement, comme danscette opération le point de recroifement des deux aiguillesna que deux lignes de diilance, fi la force du fluidemagnétique eft telle que le fluide puiflè fe déplacer dansles parties des aiguilles qui savoifinent, les réfultats neferont plus comparables. Lon verra, dans un autre Mé-moire, que la force coërcitive, qui empêche le fluidemagnétique une fois concentré par lopération de ladouble touche, de fe déplacer, eft une quantité confiante,qui varie fuivant la nature & la trempe de lacier; mais•que, lorfquun point dune, aiguille eft aimanté à fatu-i M/m. de lJc.Ji. de^ Se. An.1/3S.lai/. Ûjo.TI.MF.
Text Appearing After Image:
Fûj:ner tûl. Y- /e Gncaii jv DES Sciences. 6ï i) ration, cette force coërcitive, que lon peut comparer aufrottement dans la mécanique, fait équilibre avec la réfui-tante de toutes les forces, foit répulfives, foit attractivesde tout le fluide magnétique répandu dans laiguille, laforce de chaque point étant en raifon compofée de ladireéte des denlités & de linverfe du carré des diftances. Kécapitulation des objets coiitemis dans ce Mémoire. Des recherches qui procèdent, il réfultera : i.° Que laélion, foit répulfive, foit attradive de deuxglobes éledrifés, & par conféquent de deux moléculeséledriques, eft en raifon compofée à^s denfités du fluideéledrique des deux molécules éleélrifées, & inverfe ducarré à^s difliances. 2..° Que dans une aiguille de %o à 2,5 pouces delongueur, aimantée par la méthode de la double touche,le fluide magnétique peut être fuppofé concentré à dixiignes des extrémités de laiguille. 3. Que lorfquune a

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Flickr tags
InfoField
  • bookid:mmoiressurllectr00coul
  • bookyear:1789
  • bookdecade:1780
  • bookcentury:1700
  • bookauthor:Coulomb__C__A___Charles_Augustin___1736_1806
  • bookauthor:Fossier__ill
  • bookauthor:Le_Gouaz__Yves_Marie__1742_1816__engraver
  • bookauthor:Adam__engraver
  • bookauthor:Burndy_Library__donor__DSI
  • bookauthor:Acad__mie_royale_des_sciences__France_
  • booksubject:Electricity
  • booksubject:Magnetism
  • bookpublisher:Paris___Chez_Bachelier__libraire____
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Smithsonian_Libraries
  • bookleafnumber:58
  • bookcollection:smithsonian
Flickr posted date
InfoField
30 July 2014

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