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File:NIE 1905 Telegraph - polarized relay.jpg

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NIE_1905_Telegraph_-_polarized_relay.jpg (623 × 471 pixels, file size: 70 KB, MIME type: image/jpeg)

Summary

Description
English: Drawing of the polarized telegraph relay.
Date published 1905
Source “Telegraph,” The New International Encyclopædia, v. 19, 1905, p. 95.
Author unknown author

Licensing

Public domain
Public domain
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United States
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File history

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Date/TimeThumbnailDimensionsUserComment
current19:08, 17 August 2017Thumbnail for version as of 19:08, 17 August 2017623 × 471 (70 KB)Bob Burkhardt{{Information |Description ={{en|1=Drawing of the polarized telegraph relay.}} |Source =“Telegraph,” ''The New International Encyclopædia'', v. 19, 1905, p. 95. |Author =unknown author |Date =published 1905 |Permission...
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