Machines a Calculer

AMERICAN READY RECKONER, 1850

Inventor
Unknown
Invention date
Unknown
Manufacturing date:
1850 env
Manufacturing location
New York, USA
Manufacturer
Fischer & Brother
Dimensions
L 8 H 2 W 13
Reference Number
142
AMERICAN READY RECKONER

History and Functionality

“An assistant for merchants, mechanics and farmers.”

The objective of this scale is to give rapidly the result of multiplying a quantity by a unit price in order to get the total price.

The unit price can vary from ¼ of a cent up to $10 USD.

The quantities vary from one unit to 1,000 units.

Each page is assigned a unit price. To calculate a total just choose the page corresponding to the unit price and read the result on the line of the quantity sold.

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