THE FLY UPSIDE DOWN.
Of late years we have been taught to look at the fly with a suspicion that borders on dislike, but Dr. C. Tierney lately showed an audience of Nature Study children there there was one other way of looking at it. Look ut its feet, the wonderful feet with which it walks on the ceiling. The youngest of us may know that the fly can walk so by suction. But when the fly, having planted a foot firmly on the ceiling and put the sucker in action, wishes to release the foot, how is it done? How does the sucker come away? If it did not and the fly started to ily the legs would surely be left on the ceiling. The reason these disturbing things do not happen is that the fly, by moving a hair on its hairy feet, lets air into the sucker'-and so takes off the pressure.
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Bibliographic details
Evening Post, Volume CVII, Issue 73, 30 March 1929, Page 15
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155THE FLY UPSIDE DOWN. Evening Post, Volume CVII, Issue 73, 30 March 1929, Page 15
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