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Fireside Chat ’The Schumacher Slide Rule — A Slide Rule with divisions at equal intervals’
Fireside Chat ’The Schumacher Slide Rule — A Slide Rule with divisions at equal intervals’
Presented by Jerry McCarthy. Jerry McCarthy's reconstruction of the Schumacher Slide Rule. The device is formally known as a Faber-Castell model 366 slide rule, with the subtitle “System Schumacher”. It was produced and sold from 1909 to 1929. The title page of a 1909 document for this slide rule refers to the device as “A …