Figure 13. R. Bertel’s spectograph invented by Rudolph Bertel in 1910. This instrument was designed to study the penetration of the various wavelegths of light into the waters off Monaco. The first test of this instrument was aboard the EIDER off Monaco in 1911 in 500 to 600 meters water depth.
Photo Category: Oceanography - Historical instruments
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|Added On||18th October 2015|