pl23_ship4423.jpg
![Figure 49 ship4423.jpg Figure 49](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4423.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23ship4423jpgDescription
Figure 49. Fery refractometer, an instrument first suggested by Julius Hilgardof the United States Coast and Geodetic Survey to measure the density of seawater by relating the index of refraction of a liquid to its density. Theinstrument shown was developed by the Frenchman Charles Fery in 1891.
Credit
Oceanographic Museum of Monaco
Photographer
Y. Berard
Collection
Voyage to Inner Space
History of Oceanography Collection
The Early Instruments - Collections of the Oceanographic Museum at Monaco
Miscellaneous Instruments, Deck Gear, and Laboratory Instruments
Keywords
Oceanography