Catalogue and price list of Mackey print paoer co. (1897)
Mackey print paper co., Pittsburg, Pa. [from old catalog] · [Pittsburgh?] · leaf 140
AMBER PROTRACTORS. … 1749 The dividing lines of these Amber Protractors are on the side facing theing. and the amber being perfectly transparent they afford a most accurateing of the degrees. 1749. Amber Protractor, Transparent, Half Circle, % degrees, 4 inches... 1750.1751.1752.1753.1754.1755. Circle, y*y* draw-read-…
Drawing instruments
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