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Integraph by Coradi No.103 in box

C.V. Boys' integraph with case

1880-1885

Barker's integraph in box

Integraph by J.Amsler with wooden case. From Royal Aircraft Establishment

1910-1920
Wooden box containing Amsler's integraph, for calculating the area and first two moments, with one counterweight, three tracer arms, and a guide rail 53" long in its own box

Wooden box containing Amsler's integraph

Integraph by Coradi No.10 in box

Integraph by Coradi No.10 in box

Abdank-Abakanowicz integraph made by G. Coradi, Zurich, with extension tracer arm, two ink pens and one lead holder, in wooden box 16 1/2" x 22" x 7"

Abdank-Abakanowicz integraph made by G. Coradi

Prototype model integraph with wooden case by Stanley, London.

Prototype model integraph with wooden case by Stanley

1949-1951