PB&S Heliograph Head : 無料・フリー素材/写真
PB&S Heliograph Head / signal mirror
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | This is a view of the tripod head of a Mance Mark V heliograph, stamped "PB&S" for "Puddefoot, Bowers & Simonett Ltd." Such tripods were used both for heliographs and for signal lamps - it is stamped: "STAMP LAMP OR HELIO A Mk III". To learn more about heliographs, seehttps://en.wikipedia.org/wiki/Heliograph or www.prc68.com/I/MkVHeliograph.shtml |
| 撮影日 | 2020-01-18 14:12:07 |
| 撮影者 | signal mirror |
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