Semaphore barometer of the imperial navy, signed ERNST in Paris with a mahogany shaft, its button allowing the reading of the barometer, and a wall fixation. The device has ceramic plates with the crowned anchor of the imperial navy. The mercury has disappeared from the barometer, a ceramic plate is cracked, and the thermometer was changed. Second Empire period. H : 108 cm Provenance : Sale at Drouot on August 6, 1998.