CHAPTER IV.

The formation of snow described--Snow-crystals--Effects of the crystallizing force--Ice-flowers--Sir David Brewster’s experiment with polarised light--Regelation and moulding of ice--Characteristics of glacier-ice--Cleavage in compact ice--The aspect of glaciers--On the motion of glaciers--History of its discovery--Moraines described--Theory of glacier-motion--Quotation from Professor Tyndall--Glaciers of the Polar Regions--Glacier in Bell Sound--Formation of icebergs--Icebergs in Baffin Bay--Glacier described by Dr. Hayes--The Greenland Mer de Glace--Glacier of Sermiatsialik--The great Humboldt Glacier--Discovered by Dr. Kane--Description of its features--Kane’s theory of icebergs--Notes on the glacier 108–134