Centrolinead.png (250 × 120 pixels, file size: 4 KB, MIME type: image/png)
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:15, 21 June 2010 | 250 × 120 (4 KB) | Vyznev Xnebara | convert from BMP to PNG format | |
02:42, 29 January 2010 | 250 × 120 (88 KB) | MegaPedant | Smaller but higher quality image | ||
14:57, 2 January 2010 | 527 × 233 (14 KB) | MegaPedant | {{Information |Description={{en|1=The Centrolinead, a draughtsman's instrument invented by British engineer, architect and mathematician, Peter Nicholson (1765–1844)}} |Source=Illustration from the book "Practical Geometry" (http://books.google.com/book |
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