lity, neatness, and simplicity. Unlike other devices of a similar character, it may be usedwith equal facility either as a Section-Liner or Triangle, withoutthe slightest change in its mechanism whatever. It may be used with or without a straight-edge as a\ guide, and can be instantly adjusted from… … No. 295A.
Artists' materials · Mathematical instruments
Internet Archive · Winterthur Library · Public Domain Mark 1.0. Free to use for anything.
