“As an example of well authenticated climatic changes, we may mention that Iceland and Eastern Greenland are very much colder than they were five hundred years ago. In Iceland the immense trees which used to be common there have ceased to grow, though there are abundant evidences of the large growth at a former period, say in the fourteenth century, while on the opposite shores of Greenland, several valleys that were known to have been inhabited formerly, have become wholly inaccessible in consequence of haring been invaded by ice.”
