82 & 84 Wasbinqton St., Boston, Mass. \1\ No. 294. 6 inch Ruler . . . . ... . . . . $4-50 Sj^ inch Ruler S-oo Larger sizes will be supplied to order. The cuts on the preceding page were drawnwith this Ruler and illustrate a few of the many things which may be done with it. No. 295. w LLS…
Artists' materials · Mathematical instruments
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