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Descriptive catalogue of artists' materials, draughting papers, tracing cloth, and mathematical instruments. (1898)

Frost & Adams Co. · Frost & Adams Co., Boston, Mass. · leaf 266

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idersin that the steel points are provided with knuckle-joints instead of being fixed.This permits both points to be set perpendicular to the paper, which is anadvantage in stepping or spacing distances of 3 inches and over. In spacingteeth around a pitch circle, or in dividing a given length into…

Artists' materials · Mathematical instruments · Trade catalogs -- Artists' materials · Trade catalogs -- Mathematical instruments

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