Two photographic prints of Pascal's calculating machine (6-figure) (a) lid closed; (b) lid opened 1925
Two photographic prints of Pascal's calculating machine (8-figure) (a) with lid of case closed; (b) lid opened 1925
Two photographs (bromide prints) of an original calculating machine made by Pascal; (a) exterior 1925
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
Framed photographic enlargement of an engraving of Blaise Pascal. Photographic enlargement of engraving of Blaise Pascal
Photographic print of Maurel and Jayet's Arithmaurel calculating machine Photographic print of Arithmaurel calculating machine 1925