Check the listing for details. Old Regnault Device Determine Degree 100 Scientific Instrument 19th. Condition: Used, Made in France. Listed at 244.04 USD. It is a steam metal oven. It is made up of a lower cylindrical tank surmounted by a narrower cylinder. The latter is itself surrounded by another external cylinder to protect it from cooling by ambient air. This cylinder starts three tubes from this cylinder. A plug of a plug through which the thermometer passes graduate. Another, connected to a truncated barometer, measures the pressure of the water vapor inside the speaker and make any corrections on the graduation. The last one is intended to evacuate the water vapor having circulated in the upper cylinder. (Source: "Encyclopedia of the teaching of 18th century physics in the middle of the 20th century, under the direction of Francis Girès, Aseist editions, 2016) Shipping treated by Mondial Relay (by default) or in Colissimo (if request.