Figure 50. Knudsen bottle (first model) for sampling water
while a ship is underway. This bottle of very robust construction was devised
by the Danish professor Martin Knudsen and used in the Kattegat in 1908 on
board the C. F. GROVE and also in 1909 on board the THOR when samples were
obtained in 250 meters depth in the North Sea between Aberdeen and Stavanger.