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2018-12-18 01:51
820×505× (482519 bytes)
Spinningspark
{{Information |Description=[[Francis Ronalds]]' telegraph experiment |Source=Francis Ronalds, ''Descriptions of an Electrical Telegraph'', London: R. Hunter, 1823 |Date=published 1823 |Author=unknown/illegible artist |other_versions= }} == Licensing == {{PD-old-70}}
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current 22:09, 11 February 2019 820 × 505 (471 KB) Betelgeuse1960 Transferred from en.wikipedia via #commonshelper
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