Waves of sand and snow and the eddies which make them . Fig.; 16 Plan of snow drifi caused by clump of bushes , wind from the left; every seaman knew that a spar is best towed bluntend foremost. They steered badly, and the formwas gradually changed until the head was blunterthan the tail. Professor Hele Shaw has provedby experiment that cigar or torpedo-shaped bodieshave greater resistance if towed with their sharpend first, and has shown that this is due to thedrag of the eddying wake formed behind the blunt. 159

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Keywords: ., bookcentury1900, bookdecade1910, bookidwavesofs, booksubjectwaves