FRANCE, seconde moitié du XIXème ou début du XXème siècles

Lot 103
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Estimation :
60 - 90 EUR
FRANCE, seconde moitié du XIXème ou début du XXème siècles
Four thermometers, three of them wall-mounted: - one centigrade and in Réaulur, wall, with plate, swivel, in graduated glass (reference to 1838). Signed SECRETAN, Opti[ci]en de S.M. l'Empereur, Paris. Turntable in molded mahogany. H. plate: 36 cm - H. plate: 30.8 cm. - a centigrade, wall-mounted, with a glass tube containing a graduated paper. Signed RICHEBOURG, Opt[ci]en quai de l'horloge 29, in Paris. Stained wood turntable. H. plate : 29.5 cm - H. : tube : 20.5 cm. - a centigrade, wall-mounted, with a glass tube containing a graduated paper. Signed O. ROUSSEAU and his sons, in Paris. Stained wood turntable. H. plate : 36.8 cm - H. : tube : 30 cm. - a centigrade 160°, for liquids, with glass tube containing a graduated paper. Signed RICHEBOURG, Optician Quai de l'Horloge 29, in Paris. Cylindrical cardboard case. H. : tube : 34.5 cm. Provenance : Laboratory of Auguste VERNEUIL (1856-1913), inventor of synthetic ruby.
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