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This collection primarily contains 177 groups of English, Continental and American drafting sets and individual instruments dating from circa 1700 to 2004. These instruments were used to create technical drawings, typically by architects, draftsmen, engineers, surveyors, and students. Complementing the instruments are a small group of miscellaneous items, including medals, a model, a necktie, and a charm bracelet, and a large group of published materials, including trade catalogs and other technical, biographical, historical, and scholarly writings about drafting and scientific instruments and related subjects.