Figure 65. Marconi electrolytic sounder - a Langevin-Touly electric recording
sounder marketed by the Marconi Sounding Device Co. Ltd. which sold these
instruments in Great Britain. The Langevin-Touly instrument was first marketed
in 1935.
Image ID: ship4275, Voyage To Inner Space - Exploring the Seas With NOAA Collect Photographer: Y. Berard Credit: Oceanographic Museum of Monaco
