File:The panorama of science and art (1823) (14781728744).jpg

Identifier: panoramaofscienc02smit (find matches)
Title: The panorama of science and art
Year: 1823 (1820s)
Authors: Smith, James, 1759-1828?
Subjects: Technology Technology
Publisher: London : Caxton Press
Contributing Library: NCSU Libraries
Digitizing Sponsor: NCSU Libraries

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nd b, in the time that S and E go onceround a. 4. The electrical 7nill is represented at fig. 13. A is thewater-wheel, B the cog-wheel on its axis, C the trundle turnedby that wheel, and D the running mill-stone on the top of theaxis of the trundle. It may easily be turned by electncity, ifinstead of the round plate D for the mill-stooe, there be a hori-zontal wheel on the a.xis of the trundle C, with spur-cogs, whichwill turn two trundles placed on its opposite sides ; and on thetop of each axis of these trundles, may be a round plate, re-presenting a mill-stone ; so that this model has all the workingparts of a double water-mill, turning two mill-stones. Set the mill near the prime conductor, and place the crookedwire, so that its point may be directed towards the uppermostside of the great wheel A ; then work the electrical machine,and the stream of fire that issues from the point of the wirewill turn the wheel; and consequently ail the other workingparts of the null. jELECTEicnnr.
Text Appearing After Image:
£nffrayeti t>y JaiDavfs. P/rM/.r?/^/ t,y A^nt/nU rrsfie/X^^-r.Zivrifjre r .,rnit\. >»Js ELECTRIClTr. 231 Miscellaneww experiments. The Thunder House. The usefulness of metallic conductors applied to houses, andthe bad effects which may result from the lightning strikingupon a house not properly secured, may be shewn in a veryconvincing manner by the instrument represented at fig.1, pi. III.A is a board about three-quarters of an inch thick, and shapedlike the gable end of a house. This board is fixed perpendi-cularly upon the bottom board B, upon which the perpendicularglass pillar CD is also fitted in a hole about eight inches dis-tant from the base of the board A. A square hole ILMK, abouta quarter of an inch deep, and nearly one inch wide, is madein the board A, and is filled with a square piece of wood nearlyof the same dimensions. It is mentioned nearly of the samedimensions, because it must go so easily into the hole, that itmay drop off by the least shaking of the instr

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