Page:Scott's Last Expedition, Volume 1.djvu/421

1911] offshoot of a fold, the valley being made as the fold was elevated—curious valleys made by erosion of hard rock overlying soft.

River piracy—Domestic, the short-circuiting of a meander, such as at Coo in the Ardennes; Foreign, such as Shoalhaven River, Australia—stream has captured river.

Landslips have caused the isolation of Lake George and altered the watershed of the whole country to the south.

Later on Taylor will deal with the effects of ice and lead us to the formation of the scenery of our own region, and so we shall have much to discuss.

Sunday, May 7.—Daylight now is very short. One wonders why the Hut Point party does not come. Bowers and Cherry-Garrard have set up a thermometer screen containing maximum thermometers and thermographs on the sea floe about ¾′ N.W. of the hut. Another smaller one is to go on top of the Ramp. They took the screen out on one of Day's bicycle-wheel carriages and found it ran very easily over the salty ice where the sledges give so much trouble. This vehicle is not easily turned, but may be very useful before there is much snowfall.

Yesterday a balloon was sent up and reached a very good height (probably 2 to 3 miles) before the instrument disengaged; the balloon went almost straight up and the silk fell in festoons over the rocky part of the Cape, affording a very difficult clue to follow; but whilst Bowers was following it, Atkinson observed the instrument fall a few hundred yards out on the Bay—it was recovered and gives the first important record of upper-air temperature.

Atkinson and Crean put out the fish trap in about