Figure 66. Negretti and Zambra thermometer recorder. This instrument wasdeveloped in 1920 and was actuated by the principle of expansion and contraction of mercury in a Bourdon tube. Above: recording device. Bottom: sensorand conducting unit.
4/5/2019 9:18:54 AM
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Subject: Oceanography