The chief geological problem deals with changes in the climate of central Asin during the last few geological periods. During the glacial period in Europe and Nort America Asia was free from ice. Mongolia at that time apparently hada much more moist climate. This problem is of more than theoretical interest, for climate conis vegetation and thus influences thrust from the west. Similar moun. tains are known in other countries, but no detailed studies of thi have been made in China. planned to examine the general geology of the range and map its structure.
The desert is the geologist's paradise. All the agents of erosion and transportation are actively at work, for despite the limited rainfall with which they carry on their work there is no protecting vezetatien, Geologic processes are demonstrated on every hand, often in textbook perfection, Many writers have pointed to Mongolia with its great expanses of empty land as the place to which people may emigrate from the overcrowded plains of China proper. It is hoped to study the agricultural possibilities of this area,
Text read from the printed page and cleaned; old type leaves the occasional error.