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Drawing Instruments Plate ccxxxviii.jpg - Mdd
Farey's Elliptograph, 1825.jpg - Mdd
Elliptograph in Encyclopædia Britannica, 1824.jpg - Mdd
Rohn Ellipsograph a.svg - Jahobr
Rohn Ellipsograph a.gif - Jahobr
Rohn's ellipsograph.svg - HB
Rohn's ellipsograph animated.gif - HB
Rohn's ellipsograph animated.ogg - HB