Figure 15. Meyer bottle, invented by Heinrich Adolph Meyer, of the Commission
of Kiel, and built by Ludwig Steger. A and B are deep water set up; A
descending, B at the bottom; C shallow-water setup descending, D ascending.
These bottles were used during the POMMERANIA expedition in the North Sea
in 1872 and in 1874 during the GAZELLE circumnavigation of the Earth.