File:A study of wireless telegraphy and wireless telephony (1915) (14756442405).jpg

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Identifier: studyofwirelesst00elea (find matches)
Title: A study of wireless telegraphy and wireless telephony
Year: 1915 (1910s)
Authors: Eleazarian, Aram Movses
Subjects: Telephone systems Radio Telegraph, Wireless Theses
Publisher:
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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Text Appearing Before Image:
Very Dry ftock Fig. 30. Forms and Directions pf WavesThru Different Maferia/s . 38
Text Appearing After Image:
40. pending upon the medium thru which they are traveling1^. The following curve sheet, p.41, represents a graphicalform of comparison of transmission distances, data having beentaken from the experiments of Zenneck and ^ierce. Having shown the effects of different regions of the earthuron transmission of electric waves, the effect of light or dark-ness on it should also be noticed. This phenomenon plays an im-portant part in wireless telegraphy, particularly in distanttransmissions. Thus, for example, apparatus which can send wire-less messages a certain distance at night, may be able to transmitonly about 44^ of the distance during day, as seen from the ex-periments of Marconi and G.W.Pickard. The curve on page 42 isplotted from data given by Pickard and shows the intensity oftransmission of waves during different hours of the day. Thisdifference is explained as follows: The atmosphere between thetwo stations is more conductive in the daytime and hence absorbsmore of the energy of t

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https://www.flickr.com/photos/internetarchivebookimages/14756442405/

Author Eleazarian, Aram Movses
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Flickr tags
InfoField
  • bookid:studyofwirelesst00elea
  • bookyear:1915
  • bookdecade:1910
  • bookcentury:1900
  • bookauthor:Eleazarian__Aram_Movses
  • booksubject:Telephone_systems
  • booksubject:Radio
  • booksubject:Telegraph__Wireless
  • booksubject:Theses
  • bookcontributor:University_of_Illinois_Urbana_Champaign
  • booksponsor:University_of_Illinois_Urbana_Champaign
  • bookleafnumber:86
  • bookcollection:university_of_illinois_urbana-champaign
  • bookcollection:americana
Flickr posted date
InfoField
27 July 2014


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