AN EVERARD'S PATTERN SLIDE RULE
EDWARD ROBERTS, 18TH CENTURY
of boxwood with calculating scales on the four sides and liquor tables on the back of the three slides, signed beneath one slide,* EDWD. ROBERTS Maker in Dove Court in Old Jewry LONDON *
9in. (23cm.)
AN EVERARD'S PATTERN SLIDE RULE
EDWARD ROBERTS, 18TH CENTURY
of boxwood with calculating scales on the four sides and liquor tables on the back of the three slides, signed beneath one slide,* EDWD. ROBERTS Maker in Dove Court in Old Jewry LONDON *
9in. (23cm.)
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