Popular science monthly . e to the tomato-can toy orthe violin. It is the result that Bergers device employs either anarrow steel strip orelse a piano wire asthe vibrating member,this serving the samepurpose as the string inthe case of the can-toyor violin. One end ofthe wire is attached to aI^late in the steel hull of a\essel, the other end beingfastened to a similar plateon the opposite side, orelse terminating in a frame-work affixed to a conven-ient beam. The steel platein the side of the vessel actsas a sounding-board to sendsound-waves out into thewater, just as the bottomof t
Popular science monthly . e to the tomato-can toy orthe violin. It is the result that Bergers device employs either anarrow steel strip orelse a piano wire asthe vibrating member,this serving the samepurpose as the string inthe case of the can-toyor violin. One end ofthe wire is attached to aI^late in the steel hull of a\essel, the other end beingfastened to a similar plateon the opposite side, orelse terminating in a frame-work affixed to a conven-ient beam. The steel platein the side of the vessel actsas a sounding-board to sendsound-waves out into thewater, just as the bottomof the tin can sends waves into the of a lump of resin in the handsof a small boy as the exciting agency forthe vibrating strip, this contri\-anceemploys a motor-driven rubbing-wheel,the felt-covered rim of which is theequivalent of a violin bow and ismoistened with alcohol in order toproxide an efficient rubbing the motor which dri\cs thiswheel runs continuousK-, the wheel itselfmav be started and.
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Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
