Figure 57. Puhler sounder, described by Christian Puhler in 1563, repeated anidea first put forth by Cardinal Nicholas Pusanus a century earlier. Theprinciple, was to attach a float to a weight making it heavier than water. Upon striking bottom, t
4/4/2019 2:12:25 PM
Photographer: Y. Berard
Credit: Oceanographic Museum of Monaco
Subject: Oceanography
Subject: Historical instruments