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細節
A surveyor's combined clinometer, rule and compass,
the ivory arms with electrum mounts, bubble level, thermometer, compass well (compass lacking), signed on one face J. Fenn. 105 Newgate St London -- 12in. (30.5cm.) open; and a pair of [?] elipsograph base rules, signed Cary London, in fitted mahogany case -- 11.1/8in. (18.3cm.) wide (A Lot)
See Illustration (2)
the ivory arms with electrum mounts, bubble level, thermometer, compass well (compass lacking), signed on one face J. Fenn. 105 Newgate St London -- 12in. (30.5cm.) open; and a pair of [?] elipsograph base rules, signed Cary London, in fitted mahogany case -- 11.1/8in. (18.3cm.) wide (A Lot)
See Illustration (2)