Note 2 — ADDENDA.
Reading edition
No doubt if much more snow fell formerly than at present, the glaciers would formerly have descended somewhat lower; but as Europe now has a moderately humid climate, it is improbable in the highest degree (if indeed possible) that a difference of that kind could have caused the former extremely low descent of the ancient glaciers of the Alps: therefore we are compelled to attribute the difference to a change of temperature of some kind.