Scandalous

2012/02/18
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1669

Engraving from Mathematische Werkschule (a German version of Bion), which illustrates (fig. I) the perspectograph designed by Sir Christopher Wren in 1669. Fig.5 shows another apparatus which has two viewing points and operates with a horizontal drawing parallel motion.

Drawing Instruments 1580-1980, Hambly M, 1988

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1669 
Engraving from Mathematische Werkschule (a German version of Bion), which illustrates (fig. I) the perspectograph designed by Sir Christopher Wren in 1669. Fig.5 shows another apparatus which has two viewing points and operates with a horizontal drawing parallel motion.
Drawing Instruments 1580-1980, Hambly M, 1988

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