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![Figure 8 ship4009.jpg Figure 8](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship4009.jpg?itok=vElRVuPl)
Description
Figure 8. L. Linsbauer's photometer. Left: a picture of the unit. Right:a picture of the internal photometer mechanism. This instrument was invented byLudwig Linsbauer for use in fresh water. It was used in Lake Traunsee in thenorthern part of Austria in 1904 at small depths. (Image credit: Oceanographic Museum of Monaco | P. Roggero)