Adding machine, c 1910.

Image number: 10327824

Adding machine, c 1910.

S & N adding machine by Seidel & Naumann, Dresden. The Seidel and Naumann adding machines used chain drives and a stylus. The numbers to be added were pulled down to the base bar and then appeared in the result window. Pressing the lever A allowed the inputted figures to be checked before the machine reset, while pressing M allowed faster work as each figure reset when the stylus was removed. Subtraction was performed using the complementary columns at the sides.

Image number:
10327824
Credit:
Science Museum/Science & Society Picture Library
Date taken:
30 October 2003 09:16
Image rights:
Science Museum
 

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