This Thomas de Colmar arithmometer wasn't the primary
mechanical calculator ever built, however it become the primary commercially a
success mechanical calculator to hit the market. offered inside the mid to past
due nineteenth century, the gadget should carry out addition, subtraction,
multiplication and department. One cutting-edge reviewer raved that the
vintage-college calculator could accurately multiply an eight-parent sum
through an eight-parent sum in only 18 seconds.
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