Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 176
CT. VI. EXPERIMENTAL ILLUSTRATIONS. 151 over its middle a copper wire one-twentieth, or even one-tenth, of an inch in thickness. Connecting the two endsof the wire together, and suspending from it a weight w,of 12 or 14 pounds, the whole pressure of this weight isconcentrated on the ice which… … iound about the wire, even before it has quite entered theice, you have a frozen casing. The wire continues to sink ;the water incessantly escapes, freezing, as it does so, behindthe wire. In half an hour the weight falls ; for the wire hasgone clean through the ice. We can plainly see where ithas…
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