Note 160 — LETTERS ON SCIENCE.

The Reader of October 15 contained an article “On the Conformation of the Alps,” to which in the following issue of the journal (October 22) Sir Roderick Murchison replied in a letter dated “Torquay, 16th October,” and entitled “On the Excavation of Lake Basins in solid rocks by Glaciers,” the possibility of which he altogether denied.