Mr. Lanham's Diary, August 26, 1926

He uses a Comptometer to take inventory

Aug 26, 2022

∙ Paid

Mr. Lanham used a Comptometer today as they continued taking inventory at Lanham & Sons. According to Wikipedia, this was the first commercially successful key-driven mechanical calculator, patented in the United States by Dorr Felt in 1887. The model in Mr. Lanham’s time was similar to this one, set in a wooden box. He was so involved with the work tha…

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