File:Operating the Comptometer - 16 - After Striking Five Times.png

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Original file(1,052 × 1,193 pixels, file size: 1.69 MB, MIME type: image/png)

Summary

Description
Date
Source https://archive.org/details/methods1895b
Author Operating the Comptometer
 
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Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

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Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Operating_the_Comptometer_-_16_-_After_Striking_Five_Times.png

Illustrations from the 1895 publication 'Methods of Operating the Comptometer', an early mechanical calculator.

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