File:Britannica Goniometer Vertical-Circle.png
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Size of this preview: 383 × 599 pixels. Other resolutions: 153 × 240 pixels | 516 × 807 pixels.
Original file (516 × 807 pixels, file size: 22 KB, MIME type: image/png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:53, 5 August 2009 | 516 × 807 (22 KB) | Bob Burkhardt | {{Information |Description={{en|1=Technical illustration of a vertical-circle goniometer.}} |Source=Encyclopædia Britannica, 11th ed., Vol. 12, p. 234 |Author=unknown; instrument by W. H. Wollaston |Date=published 1911; instrument made in 1809 |Permissio |
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