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| The Early Republic
The World Stage
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From the 1890s, American
science and engineering students were taught to do routine calculations
using a slide rule. Wearing a slide rule in the pocket or on the belt
became a symbol of technical expertise. This model, made especially for
students, was last used by the electrical engineer Robert H. Wieler
(1923-1993).
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Some teaching aids have been made by students and their teachers. These are some of the earliest surviving models made by high school teacher A. Harry Wheeler. Wheeler taught in Worcester from the mid-1890s into the 1940s. He and his students made hundreds of paper, plastic, wooden, and string models. The other photograph below shows Wheeler and a student in 1937.
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