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An Improved Method in the Art of Signalling for Military & Scientific Purposes ...: Finley's ...
Content Provider | Internet Archive |
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Author | John P. Finley |
Organization | University of Michigan |
Language | English |
Publisher | American Helio-Telegraph & Signal Light Co. |
Publisher Date | 1887-01-01 |
Access Restriction | Open |
Subject Keyword | signals signal instrument sighting exposition telescope mirrors mirror tripod heliograph opposite station signal carrier public domain carrier bar google book station mirror sighting spot mirror bars distant station book search |
Content Type | Text |
Resource Type | Book |