freeze, which is
always injurious to trees that have been removed from their original
soil. Such freezing is always destructive to trees out of the ground.
Small trees and seedlings may be covered entirely, to be kept through
the winter. Put coarse straw manure on the earth, over trees large
enough for setting, that are to be preserved heeled in during winter;
and straw or corn-fodder over the tops, during the coldest weather, and
they will come out perfect in the spring.

If not ready to set out your trees at once, you may preserve them in
perfect condition to very late in spring, in this way, by raising them
once, to check vegetation, and putting them back, and shading their
stems and mulching the roots, after the commencement of warm weather.
Trees may thus be preserved in better condition for transplanting than
those left in the nursery, and they will make a larger growth the first
season.

LEEKS.

These are said to be natives of Switzerland. We think this doubtful, as
they are an article of daily food in Egypt, and were so highly esteemed
there, centuries ago, as to become an object of worship. They are used
as a pot-herb, to give a flavor to soups and stews. They are not
bulbous, like onions, but have a long stem, which is principally used.
They are transplanted very deep, so as to obtain a long white neck. The
ends of the roots are to be cut off when transplanted, and they should
be set in rows a foot apart, and from four to six inches in the row.
There are several varieties, distinguished mainly by the width of the
leaves,--the _Flanders_ (or _narrow-leafed_), the _Scotch_, and the
_Broad London_.

We know no use of leeks for which onions would not be equally good, and,
hence, do not recommend their cultivation.

LEMON.

This is the finest acid fruit grown, and belongs to warm climates; but
by getting good budded trees from the South, and setting in
glass-houses, protected from severe frosts, we may grow lemons in
abundance at the North.

By a system of acclimation and protection, we anticipate seeing oranges
and other Southern fruits grown at the North as a domestic luxury, and
perhaps at a profit for market. The houses necessary for protection may
be worth more for other purposes than their cost and care, without
interfering with their use for orange and lemon culture.

LETTUCE.

The varieties are numerous, and most of them do well on very rich land,
well hoed. Only two kinds of summer-lett