Smithsonian Miscellaneous Collections, Volumen30

acid action American Philosophical Society apparatus appears arrangement atmosphere atoms aurora axis battery bell Block Island boiler Cactus Cayuga lake circuit coast coil condition conductor connected copper current electricity cylinder Daboll trumpet diameter diminished discharge distance earth effect electricity elevation engine exhibited fact feeble feet fog-signals force galvanic galvanometer given greater heard heat helix hypothesis inches increased indicated induced current induction Institution instrument intensity investigations Lake Lake Ontario length Leyden jar light Light-House Board magnetism matter ment mentioned metal miles miles per hour minutes Mistletoe motion nearly needle observed obtained opposite direction passed penetrating power phenomena phosphorescence plate poles portion pressure primary current principles produced Professor Henry quantity reference reflection river Sandy Hook secondary current shock signal siren sound spark spiral steam steamer surface temperature tion tricity trumpet velocity vessel waves whistle whole wind wire zinc