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The observation is rare, if not new, but I have seen in water slowly freezing six-rayed ice-stars formed, and floating free on the surface. A six-rayed star, moreover, is typical of the construction of all our lake ice. It is built up of such forms wonderfully interlaced. Take a slab of lake ice and place it in the path of a concentrated sunbeam. Watch the track of the beam through the ice.
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