Figure 42. The "Hydra" Sounding Machine.
In: "The Depths of the Sea" by C. Wyville Thomson, 1874. P. 218.
Library Call Number GC75 .T48 2nd ed. 1874.
Image ID: ship3126, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photographer: Archival Photography by Steve Nicklas, NOS, NGS
Category: Historical Ships/Sounding/
• High Resolution Photo Available