File:Bells Photophon Schema.jpg

Bells_Photophon_Schema.jpg (640 × 396 pixels, file size: 36 KB, MIME type: image/jpeg)

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Description
English: Alexander Graham Bell's photophone -technical drawing by Bell
Date
Source http://de.wiki.x.io/wiki/Datei:Bells_Photophon_Schema.jpg
Author Meyers Konversationslexikon von 1888
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current05:04, 6 August 2009Thumbnail for version as of 05:04, 6 August 2009640 × 396 (36 KB)Harryzilber{{Information |Description={{en|1=Alexander Graham Bell's photophone -technical drawing by Bell}} |Source=http://de.wiki.x.io/wiki/Datei:Bells_Photophon_Schema.jpg |Author=Meyers Konversationslexikon von 1888 |Date=1888 |Permission= |other_versions=on

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