Professor Albrecht Penck, of the University of Vienna, delivered his second lecture on "The Alps in the Great Ice Age" yesterday afternoon, discussing as his special topic, their glacial structure. In explaining this, Professor Penck, with the help of stereopticon views, described the various topographical phenomena of these mountain regions; the broken, or hanging glaciers, the curiously shaped river troughs and the "reverse" drainage in many of the river systems. All these are the result of glacial erosion. The action of the ice is responsible for the uneven river troughs, which cause drainage in all directions; and also for the bowl-like nature of the mountain valleys.
In his third and last lecture, which will be given in the Geological Lecture Room of the University Museum at 4.30 this afternoon, Professor Penck will discuss "Man and the Ice Age."
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