Tyndall, John, 1820-1893 · New York, D. Appleton · leaf 175
ice between the two slabs of boxwood. Dark streakssoon begin to draw themselves across the substance, atright angles to the direction of pressure. Right in themiddle of the mass they are appearing; and as the pressurecontinues, the old streaks expand and new ones are de-veloped. The entire column… … motion into the liquid condition. We have here liquefiedthe ice in planes perpendicular to the pressure, and theseliquid planes interspersed throughout the mass give itthis laminated appearance. If instead of diffusing the pressure over surfaces ofconsiderable extent, we concentrate it on a small…
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