Stepped Reckoner:
During 1671AD, G.V Leibniz built this device by modifying the pascaline.
The components of this device is that centerpiece of the machine was stepped-drum gear design, which offered an elongated version of simple flat gear.
Its main purpose is that it can perform all four arithmetic operations i.e. addition, subtraction, multiplication and division.
The main features of this device are as follows:
a)Addition or subtraction is performed in a single step, with
a turn of the crank
b)The machine performs multiplication by repeated
addition, and division by repeated subtraction.
c)The machine is about 67 cm (26 inches) long, made of
polished brass and steel, mounted in an oak case.
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