Figure 13. Negretti and Zambra thermometer, 1878 model. This instrument is the direct ancestor of most reversing thermometers used up to this time. This wasthe first instrument to break the column of mercury after reversing to obtainthe reading.
4/5/2019 9:18:46 AM
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Subject: Oceanography
Subject: Historical instruments