THERMOMETERS ON THE FLOE 
265 
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 £' 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, afford- 
ing 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 
