Beyond the limits of this scale, the pressures exerted rise very rapidly. A wind recorded as blowing at the rate of a hundred miles per hour exerts a pressure of about twenty-three pounds per square foot of surface exposed to it. Wind above eighty miles per hour is stated to "prostrate everything." The mileages registered by our anemometer were the mean for a whole hour, neglecting individual gusts, whose velocity much exceeded the average and which were always the potent factors in destructive work. Obviously the greatest care had to be taken to secure everything. Still, articles of value were occasionally missed. They were usually recovered, caught in crevices of rock or amongst the broken ice. Northward from the Hut there was a trail of miscellaneous objects scattered among the hummocks and pressure-ridges out towards Penguin Hill on the eastern side of the boat harbour: tins of all kinds and sizes, timber in small scraps, cases and boards, paper, ashes, dirt, worn-out finnesko, ragged mitts and all the other details of a rubbish heap. One of the losses was a heavy case which formed the packing of part of the magnetometer. Weighted-down by stones this had stood for a long time in what was regarded as a safe place. One morning it was discovered to be missing. It was surmised that a hurricane had started it on an ocean voyage during the previous day. Boxes in which Whetter used to carry ice for domestic requirements were as a rule short-lived. His problem was to fill the boxes without losing hold of them, and the wind often gained the ascendancy before a sufficient ballast had been added. We sometimes wondered whether any of the flotsam thus cast upon the waters ever reached the civilized world. Whatever has been said relative to the wind-pressure exerted on inanimate objects, the same applied, with even more point, to our persons; so that progression in a hurricane became a fine art. The first difficulty to be encountered was a smooth, slippery surface offering no grip for the feet. Stepping out of the shelter of the Hut, one was apt to be immediately hurled at full length down wind. No amount of exertion was of any avail unless a firm foothold had been secured. The strongest man, stepping on to ice or hard snow in plain leather or fur boots, would start sliding away with gradually increasing velocity; in the space of a few seconds, or earlier, exchanging the vertical for the horizontal position. He would then either stop suddenly against a jutting point of ice, or glide along for twenty or thirty yards till he reached a patch of rocks or some rough sastrugi.