X – bibliotecapleyades.net, Chapter iv. historical development of the theory . rotatory motion and the “screw effect” wm. thomson (lord kelvin) first asserted that magnetism possesses a “rotatory” character related to heat or the thermal motions of a body (proc. r.s. viii , p. 150).nikola tesla made many references to wm. thomson, pointing to his work as a prelude to his own discoveries and applications.
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History electromagnetic theory – wikipedia, The history electromagnetic theory begins ancient measures understand atmospheric electricity, lightning. people understanding electricity, unable explain phenomena. scientific understanding nature electricity grew eighteenth nineteenth centuries work researchers ampè, coulomb.
Animal magnetism – wikipedia, Animal magnetism, mesmerism, german doctor franz mesmer 18th century believed invisible natural force (lebensmagnetismus) possessed living/animate beings (humans, animals, vegetables, .). believed force physical effects, including healing. persistently success achieve.
Horizontally launched projectiles – physics, Horizontally launched projectiles. imagine cannonball launched cannon atop high cliff. imagine cannonball encounter significant amount air resistance..