細節
J.A. ROOKER, London
A lacquered-brass Roget-pattern slide rule, with single slide and engraved scales, the back signed Dr. Roget Sec: R.S. Inv:, Rooker London -- 10½in.(26.5cm.)long, in red leather-covered case
A lacquered-brass Roget-pattern slide rule, with single slide and engraved scales, the back signed Dr. Roget Sec: R.S. Inv:, Rooker London -- 10½in.(26.5cm.)long, in red leather-covered case
出版
Turner, G. Nineteenth Century Scientific Instruments, pg. 288-9.