Figure 40. Current recording device invented by Pierre Idrac in 1927. Thisdevice was first used in the Gulf of Gascogne and in the la Manche on the vessel POURQUOI-PAS in 1927.
4/4/2019 1:56:28 PM
Photographer: P. Roggero
Credit: Oceanographic Museum of Monaco
Subject: Oceanography
Subject: Historical instruments