[page] 729

'Note on a rock seen on an iceberg in 61° south latitude,' by C. Darwin, Esq.

In this paper the author has collected together all the facts relative to the fragment of rock seen on an iceberg, and points out the value of such an evidence of the transporting power of ice. The part of the rock visible was estimated my Mr. McNab, mate of the vessel, who made a sketch of it at the time, at twelve feet in height, and from five to six feet in width; the remainder was buried in the ice.

The iceberg was distant 1400 miles from the nearest certainly known land, but it is highly probable that land may exist not above three hundred miles immediately to the southward.

"If, then," concludes Mr. Darwin, "but one iceberg in a thousand, or in ten thousand, transport its fragment, the bottom of the Antarctic Sea, and the shores of its islands, must already be scattered with masses of foreign rock, the counterpart of the erratic boulder of the northern hemisphere."

Among the illustrations to the above papers was a beautiful chart of the South Polar Sea, just published at the Hydrographic Office of the Admiralty; and a trigonometrical survey of the river Tigris, from Ctesiphon to Mosul, by Lieutenant Lynch, Indian Navy, communicated by Sir John Hobhouse, President of the India Board.