Rapports: Inland navigation. Question 1. The role of inland waterway transport. Question 2. Evolution of types of propulsion and control of single craft and trains of barges. Question 3. New means of utilising the hydraulic energy of navigable waterways. Comm. 1. Means of dealing with large differences in head in order to facilitate the passage of vessels on inland waterways. Comm. 2. Means of making watertight the beds and dikes of navigable canals and rivers. Comm. 3. Influence of ice on navigable waterways and on sea- and inland ports