File:PSM V20 D677 Fulgurite tubes created by vitrification of sand by lighting.jpg
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current | 05:55, 24 April 2015 | 1,414 × 900 (311 KB) | Ineuw | Cleaned image and improved contrast | |
00:48, 23 August 2010 | 1,375 × 856 (268 KB) | Ineuw | {{Information |Description = Fulgurite tubes created by vitrification of sand by lighting |Source = http://en.wikisource.org/wiki/Page:Popular_Science_Monthly_Volume_20.djvu/677 |Date = 1881-1882 |Author = Unknown |Permission = {{PD-old}} |other_ver |
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