1885 Felt &Tarrant; "Comptometer" adding machine.
"The interactive Adding Machine, one you can use!!"
To add: Just click on the keys, and the values will be added automatically to the display window.
To reset: Click on the reset lever (on the right), to zero the display.
Row values The bottom row equals 1, the next 2... the top row equals 9.
Column values increase ten fold from right to left. <--
The right most column is for cents, the next column is for dimes, dollars, tens of dollars,
and so on...
This machine was used mainly for addition, but is capable of subtraction, multiplication and division.
