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Two photographic prints of Pascal's calculating machine (8-figure) (a) with lid of case closed; (b) lid opened

1925

Bromide print of Burrough's adding and listing machine

1925

Two photographic prints of Pascal's calculating machine (6-figure) (a) lid closed; (b) lid opened

1925

Photograph of engraving

1925

Photo of Stern's calculating machine

1927

Two photographs (bromide prints) of an original calculating machine made by Pascal; (a) exterior

1925

Photograph of engravings of Morland's multiplying instrument

1925

Photographic prints of Leibniz's calculating machine

1925

Photo of pencil drawing of Staffel's calculating machine

1927
Framed photographic enlargement of an engraving of Blaise Pascal.

Photographic enlargement of engraving of Blaise Pascal

Six photographs (each 11 1/2" x 9 1/2") showing Burroughs machines in operation in Banks etc (Westminster Bank, Midland Bank, Brown Bros. Ltd., J.Lyons and Co., L.M.S. Rly, Coutts Bank)

Six photographs (each 11 1/2" x 9 1/2") showing Burroughs machines in operation in Banks etc (Westminster Bank

1929
12" x 10" bromide print of "Archimedes" calculating machine

Print of "Archimedes" calculating machine

1925
12" x 10" bromide print of Colts calculator

12" x 10" bromide print of Colts calculator

1925
Photo print, 8 1/2" x 6 1/2", of Prof. Selling's calculating machine, 1886

Photo print

1924
Photo print of Barrett adding machine, c. 1915

Photo print of Barrett adding machine, c. 1915

1925
Photographic print of Maurel and Jayet's Arithmaurel calculating machine

Photographic print of Arithmaurel calculating machine

1925