wn, may be used. As it gains will wind the cord up very tightly, rising most. cu- speed, the water, under the, effect of centrifugal force, riously as the twist tightens; with attendant danger forms a cup, sinking in the middle and rising around of breaking the cord. The disk, in virtue of the the… … horizontal position, as was the box cover. A moistened sponge or piece of blotting paper will shower water in rotation is changing its direction is interesting, while all directions if pinned to the cork and rotated, even case may be. A tall chimney or tower of like propor- the perfect glassy cup…
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