Gilt carved wood barometer - thermometer decorated with laurel leaves and two hearts, symbol of the love, and the gardening attributs. Signed "Robert opticien/ Passage St Pierre/ N° 4 à Versailles". Numerous historical inscriptions for the thermometer.
France.
18th century.
After Torricelli (1608 - 1647) and Réaumur (1683 - 1757).