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"Diagraphe", perspectograph for drawing from nature in perspective or orthogonal projection

1880-1910

Ronald's patent perspectograph, in red leather bound case

Diagraphe perspectograph, in fitted mahogany case

Diagraphe, perspective instrument for drawing from nature or orthogonal projection drawings

1890-1910

Ronald's perspectograph, in mahogany case

Selection of three perspective drawing instrument by Jecker Freres, Paris, in brass, one the same size as first and one larger, in wood; each in felt-lined mahogany box.

Perspective drawing instruments

1820-1829
Perspective drawing instrument on wooden base, invented by the late Hugh Cecil Robinson and made under his supervision by Stanley, Great Turnstile, London, with 6 working drawings and 3 tracings relating to instrument

Perspective drawing instrument on wooden base

1880-1910