ru' 





ICE-QUAKES IN THE SEA-ICE, Sept. 23, 191 1. 



The ice has settled down with the tide on a huge boulder and so formed radiating 

 cracks, just as has happened in the earth's crust. The ice is six feet thick. In 

 the distance is the fallen " Arch Berg " just west of Cape Evans. 



THE TIDE-CRACK AT THE NORTH-WEST CORNER OF CAPE 



EVANS, Sept. 23, 191 1. 



On the right is the moving sea-ice, on the left the fixed ice-foot. The blizzard 

 "bridges" the crack by cornices built from the south. The overhanging snow 

 fills crevasses similarly, and thus arises the wedge shape of the bridges — ror 

 these cornices are thickest in the middle. Behind is Inaccessible Island with its 

 wind-blown sand ridares on the risrht. 



