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

1890-1910

Perspective drawing instrument

1820-1829

Diagraphe perspectograph, in fitted mahogany case

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

1880-1910

Ronald's patent perspectograph, in red leather bound case

Perspective machine by James Watt

Ronald's perspectograph, in mahogany case

One of three perspective drawing instrument by Jecker Freres, Paris, in brass; in felt-lined mahogany box

Perspective drawing instrument

1820-1829
One of three perspective drawing instrument in wood in felt-lined mahogany box.

Perspective drawing instrument

1820-1829
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