Details
A Professor R. H. Smith's Calculator
with printed spiral scale in graduated brass sleeve with wood knobs at ends, instruction sheet and leatherette-covered tube case labelled Prof. R. H. Smith's Cylindrical Logarithm Slide -- 7¾in.(9.4cm.)long, late 19th century
with printed spiral scale in graduated brass sleeve with wood knobs at ends, instruction sheet and leatherette-covered tube case labelled Prof. R. H. Smith's Cylindrical Logarithm Slide -- 7¾in.(9.4cm.)long, late 19th century
Further details
See illustration