File:Blue Light.JPG
From Infogalactic: the planetary knowledge core
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Original file (1,944 × 2,592 pixels, file size: 1.72 MB, MIME type: image/jpeg)
Summary
Blue light, a pyrotechnic composition commonly used in the 19th century for night-time signaling and general illumination. Modern reproduction of the 1863 recipe listed in The Ordnance Manual for the Use of the Officers of the United States Army.
Licensing
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File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:58, 5 January 2017 | 1,944 × 2,592 (1.72 MB) | 127.0.0.1 (talk) | Blue light, a pyrotechnic composition commonly used in the 19th century for night-time signaling and general illumination. Modern reproduction of the 1863 recipe listed in The Ordnance Manual for the Use of the Officers of the United States Army. |
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