Lot Essay
As engineer to the Academy of Sciences, Langlois was entitled to free lodging and retail space in the Lourve.
Details
LANGLOIS, Paris
A brass sector engraved with various scales -- 6¾in.(17cm.) long; a folding square engraved with various scales -- 6¾in.(17cm.) long; and a brass protractor divided 10°-180°-10° -- 4in.(10cm.) wide; all signed Langlois Paris aux Galleries du Lourve, circa 1750 (3)
A brass sector engraved with various scales -- 6¾in.(17cm.) long; a folding square engraved with various scales -- 6¾in.(17cm.) long; and a brass protractor divided 10°-180°-10° -- 4in.(10cm.) wide; all signed Langlois Paris aux Galleries du Lourve, circa 1750 (3)
Literature
Hambly (1988), Drawing Instruments, p.28
Further details
See illustration