rocks, in the flutings upon the bottom of the glacier leading up to the eminences by which they have been caused.

Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
Fig. 5.

§ 3. It is, therefore, evident that when a glacier passes over ground such as has been indicated in § 1, it is supported upon a number of points, and bridges many hollows; that the parts of the rock which the ice touches sustain the entire weight and friction of the glacier, and are alone abraded, while the hollows escape.