A piece of apparatus was designed with which it was hoped to determine the relative rates at which glacier ice would respond by flow to the same head at varying depth pressures. The primary object of the experiments was frustrated, but measurements were secured which permitted the plotting of a curve showing the approximate relation of rate of flow and temperature in ice. A temperature zoning was then introduced in blocks of ice to simulate that supposed to exist in glaciers. On subjecting these blocks or model glaciers to pressure, it was found that warm bottom ice moves out laterally from beneath colder ice and that transverse crevasses are developed by this differential movement. Applications of the results of the experiments to glacial dynamics and to the temperature zoning in glaciers are then briefly discussed.