Image: Ronalds telegraph
Size of this preview: 800 × 493 pixels. Other resolutions: 320 × 197 pixels | 820 × 505 pixels.
Original image (820 × 505 pixels, file size: 352 KB, MIME type: image/png)
Description: Francis Ronalds' telegraph experiment
Title: Ronalds telegraph
Credit: Francis Ronalds, Descriptions of an Electrical Telegraph, London: R. Hunter, 1823
Author: unknown/illegible artist
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
Image usage
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