Aboard a small boat pulled by a tugboat in the Toulon harbor, Jules-Louis Breton and some members of the Invention Department Technical Engineering Committee try out underwater goggles to find a subma...
As part of a Higher Committee organized by the Invention Department, mechanics attach a wheel then couple a gun to Lieutenant Breton's tank.
The Higher Invention Committee attends anti-torpedo test-firing beside a lake.
During the war, from 1914 to 1918, a cable-operated funicular railway built by the company Etcheverry is loaded with boxes of ammunition and tested in the open countryside at ground level and over wat...
In Vincennes, the members of the Studies and Technical Experiments section of the Invention Department attend the test destruction of barbed-wire networks by a Latil tractor. In a meadow on the outski...