3,125 CHF
LARPENT & JÜRGENSEN POCKET THERMOMETER Larpent & Jürgensen, Kiöbenhaven (Copenhagen). Made circa 1815. Interesting and rare early silver Réaumur pocket thermometer made to the design of Frederick Houriet. Three-body, “forme collier”, polished. White enamel with Réaumur scales with indications for “Degrés du froid”, Glace and “Degrés du chaud”. Blued steel hand. Gilt brass with bimetallic curb, rack-and-pinion transmission with coiled return spring, micrometrically adjustable lever mounted at the end of the rack acted upon by the curb. Dial signed. DIAM. 63 mm. Notes This type of pocket thermometer was first made by Fréderic Houriet followed by Urban Jürgensen and Abraham Louis Breguet. It was described by Houriet in an advertising leaflet, unfortunately undated. The bimetallic thermometer device is extensively explained and illustrated by Urban Jürgensen in “Principes Généraux de l’Exacte Mesure du Temps par les Horloges”, Copenhagen, 1805, pp. 245-253, pl. XIX. An almost identical thermometer signed `Fred Houriet` was sold by Antiquorum, Geneva, October 11th, 2003
Auctioneer:
Antiquorum
Date:
2013-03-17
