Figure 60. Knudsen inverting bottle invented by Professor Martin Knudsen withthe collaboration of Hans J. Nielsen in 1929. The construction was very simpleand robust as the bottles were to be used in a series on a cable. The appearance and closing
4/4/2019 2:06:40 PM
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Subject: Oceanography
Subject: Historical instruments