A set of Ross Mensuration Blocks; image credit on full record.
image credit on full record.
image credit on full record.
image credit on full record.
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Measure; Ross Mensuration Blocks, Boxed Set.
A group of "The Ross Mensuration Blocks" in a dovetailed box. Fremont, Ohio, ca. 1900. Wood and tin geometric shapes with labels in box with red wash,... [more detail available via subscription]