Details
A boxwood slide-rule
by Cary, 181 Strand, with slides on two faces, the edges with charts of cubic capacities, specific gravities and keys to calculating scales -- 12in. (30.5cm.) long
by Cary, 181 Strand, with slides on two faces, the edges with charts of cubic capacities, specific gravities and keys to calculating scales -- 12in. (30.5cm.) long