Some daily variation in the temperature of adjoining localities is caused by a dark soil in the one and a light soil in the other, but the differences of mean annual temperature are almost wholly due to differences of latitude and elevation.
Even in the coldest localities eight or nine months are wholly free from frost, and in the coast parishes frost occurs only a few days in each year.
In good seasons and exceptional localities the yield may approach a bale per acre, as in Assumption parish, and in the Mississippi valley at the junction of Louisiana, Mississippi and Arkansas.
The Riesengebirge is the legendary home of Number Nip (Ri bezahl), a halfmischievous, half-friendly goblin of German folklore, and various localities in the group are more or less directly associated with his name.
Lichens are generally mounted on sheets of paper of the ordinary size, several specimens from different localities being laid upon one sheet, each specimen having been first placed on a small square of paper which is gummed on the sheet, and which has the locality, date, name of collector, &c., written upon it.