File:Popular electricity magazine in plain English (1913) (14578696007).jpg

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English:

Identifier: popularelectric619131chic (find matches)
Title: Popular electricity magazine in plain English
Year: 1912 (1910s)
Authors:
Subjects: Electricity
Publisher: Chicago, Ill. : Popular Electricity Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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rated by endlesschains driven by motors and the craft are carried from one level to the other in re-markably short time. As many as 1,600 boats have been earned through in one day. STUDYING STARS IN AN ARTIFICIAL SKY Within a huge globe at the ChicagoAcademy of Sciences one may see in a few-minutes a representation of 692 of theprinciple stars visible in Chicago duringthe year. To do this by a study of theheavens would require hours of carefulwatching for a whole year. move. The great globe is revolvingslowly. The moon rises and sets and-thenthe sun, both being represented by theingenious use of electric lights. The sphere, which is fifteen feet indiameter, is constructed of thin gal-vanized sheet iron and weighs 500 pounds.^____ The stars are tiny perforationsin the sphere through whichshine outside daylight or elec-tric illumination. Each glim-mering point is accuratelyplaced according to the starit represents in the realheavens. Around the globe on theoutside and on the line of the
Text Appearing After Image:
Huge Sphere Containing an Artificial Sky in which to Study Stars Passing through a door and up a fewsteps the observer finds himself on awooden platform, inside the globe, cap-able of holding fifteen persons. Thedoor closes and everything is dark.Gradually the eyes become accustomedto the darkness and one by one stars areseen in the man made sky. An attendantsnaps a switch and the stars begin to equator is a metal ring to which theglobe is secured and this ring runs ingrooved wheels as the sphere is turnedby an electric motor under the plat-form. The globe, designed by Prof. WallaceW. Atwood of the Academy, cost s$10,000and was presented to the institution byLa Verne W. Noyes. 474 POPULAR ELECTRICITY and the WORLDS ADVANCE 475

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https://www.flickr.com/photos/internetarchivebookimages/14578696007/

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Volume
InfoField
1913
Flickr tags
InfoField
  • bookid:popularelectric619131chic
  • bookyear:1912
  • bookdecade:1910
  • bookcentury:1900
  • booksubject:Electricity
  • bookpublisher:Chicago__Ill____Popular_Electricity_Pub__Co_
  • bookcontributor:Smithsonian_Libraries
  • booksponsor:Smithsonian_Libraries
  • bookleafnumber:487
  • bookcollection:smithsonian
Flickr posted date
InfoField
28 July 2014



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