National Geographic : 1924 Jan
THE CONQUEST OF THE SAHARA BY TIHE AUTOMOBILE TIE TRACTORS MAKING THEIR WAY THROUGH A SEA OF SAND The personnel of the Trans-Sahara Expedition consisted of the manager of the Citroen automobile works, a former military airman, a representative of the French Air Ministry, a scientific observer, a moving-picture operator, and five expert mechanics. The longest single stage of the journey between supply stations was 812 miles. ruotograpns Iroin Anure tltroen IN THE VALLEY OF THE WADI MIA This deep-cut river bed descends from the Tademait plateau, and its dried-up stream was once one of the most important of this region. Though the Sahara has lost many of its former surface rivers, French engineers have irrigated large areas by tapping artesian waters.