Figure 66. Negretti and Zambra thermometer recorder. This instrument was
developed in 1920 and was actuated by the principle of expansion and contraction
of mercury in a Bourdon tube. Above: recording device. Bottom: sensor
and conducting unit.
Image ID: ship4363, Voyage To Inner Space - Exploring the Seas With NOAA Collect Photographer: Y. Berard Credit: Oceanographic Museum of Monaco