The temperature of the season, with respect to heat and cold, drought and wet, differing in every year, experiments made one year cannot, with certainty, determine for the following. They may assist, but cannot be conclusive. The hints of Linnæus, however, constitute a universal rule, as trees and shrubs, bud, leaf, and flower, shed their leaves in every country, according to the difference of the seasons.
Mr. Stillingfleet is the only person that has made correct observations upon the foliation of the trees and shrubs of this kingdom. The following is his calendar, which was made in Norfolk, in 1765:—
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In different years, and in different soils and expositions, these trees and shrubs vary as to their leafing; but they are invariable as to their succession, being bound down to it by nature herself. A farmer, therefore, who would use this sublime idea of Linnæus, should diligently mark the time of budding, leafing, and flowering of different plants. He should also put down the days on which his respective grains were sown; and, by comparing these two tables for a number of years, he will be enabled to form an exact calendar for his spring corn. An attention to the discolouring and falling of the leaves of plants, will assist him in sowing his winter grain, and teach him how to guess at the approach of winter. Towards the end of September, which is the best season for sowing wheat, he will find the leaves of various trees as follows:—
Plane-tree, tawny.
Oak, yellowish green.
Hazel, yellow.
Sycamore, dirty brown.
Maple, pale yellow.
Ash, fine lemon.
Elm, orange.
Hawthorn, tawny yellow.
Cherry, red.
Hornbeam, bright yellow.
There is a certain kind of genial warmth which the earth should enjoy at the time the seed is sown. The budding, leafing, and flowering of plants, seem to indicate this happy temperature of the earth. Appearances of this sublime nature may be compared to the writing upon the wall, which was seen by many, but understood by few. They seem to constitute a kind of harmonious intercourse between God and man, and are the silent language of the Deity.
Welcome, ye shades! ye bowery thickets, hail!
Ye lofty pines! ye venerable oaks!
Ye ashes wild, resounding o'er the steep!
Delicious is your shelter to the soul!
Yes, indeed, the woodland is an ever-pleasant place. There we may couch ourselves upon the mossy bank, and listen to the murmuring "brook that bubbles by," or to the sweet sounds that issue from
Every warbling throat
Heard in the tuneful woodlands.