A catalogue and price-list of drawing instruments (1892)
Alteneder, Theodore & sons, Philadelphia. [from old catalog] · [Philadelphia, T. Alteneder & sons] · leaf 15
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…
Drawing instruments
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