IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. In 1895, Otto Steiger, a Swiss ...

This key-set, non-printing stepped drum calculating machine has a metal case painted black. Each of the nine columns of keys has nine black plastic keys. Between each row of keys, rods that are black ...

A DISPLAY of calculating machines was arranged early this month by the Burroughs Adding Machine, Ltd.,at 136 Regent Street, London, W.I. The machines shown were of many types, ranging from the simpler ...

THE calculating machine for the solution of differential equations constructed by Dr. V. Bush, of the Massachusetts Institute of Technology, has attracted a great deal of attention, and a similar ...