"The term icebergs has commonly been applied to those immense bodies of ice situated on the land, 'filling the valleys between the high mountains,' and generally exhibiting a square perpendicular towards the sea. They recede backward inland to an extent never explored. Martin, Crantz, Phipps, and others, have described those wonders of nature, and all agree as to their manner of formation, in the congelation of the sleet and rains of summer, and of the accumulated snow, partly dissolved by the summer sun, which, on its decline, freezes to a transparent ice. They are as permanent as the rocks on which they rest: for although large portions may be frequently separated, yet the annual growth replaces the loss, and probably on the whole, produces a perpetual increase. I have seen those styled the Seven Icebergs, situated in the valleys of the north-west coast of Spitzbergen; their perpendicular front may be about 300 feet in height, the green colour, and glistening surface of which, form a pleasing va-riety in prospect, with the magnificence of the encompassing snow-clad mountains, which, as they recede from the eye, seem to rise 'crag above crag,' in endless perspective.

"Large pieces may be separated from those icebergs in the summer season, when they are particularly fragile, by their ponderous overhanging masses overcoming the force of cohesion; or otherwise, by the powerful expansion of the water; filling any excavation or deep-seated cavity, when its dimensions are enlarged by freezing, thereby exerting a tremendous force, and bursting the whole asunder.

"Pieces thus or otherwise detached, are hurled into the sea with a dreadful crash: if they are received into deep water, they are liable to be drifted off the land, and, under the form of ice-islands, or ice-mountains, they likewise still retain their parent name of icebergs. I much question, however, if all the floating bergs seen in the seas west of Old Greenland, thus derive their origin, their number being so great, and their dimensions so vast."

Magnitude Of Icebergs

"If all the floating islands of ice thus proceed from disruptions of the icebergs generated on the land, how is it that so few are met with in Greenland, and those comparatively so diminutive, whilst Baffin's Bay affords them so plentifully, and of such amazing size ? The largest I ever saw in Greenland, was about 1000 yards in circumference, nearly square, of a regular flat surface, twenty feet above the level of the sea; and as it was composed of the most dense kind of ice, it must have been 150 or 160 feet in thickness, and in weight about 2,000,000 of tons. But masses have been repeatedly seen in Davis' Straits, nearly two miles in length, and one-third as broad, whose rugged mountain summits were reared with various spires to the height of more than 100 feet, whilst their base must have reached to the depth of 150 yards beneath the surface of the sea. Others, again, have been observed, possessing an even surface of five or six square miles in area, elevated thirty yards above the sea, and fairly run aground in water of 90 or 100 fathoms in depth; the weight of which must have been upwards of two thousand millions of tons,"