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 ground where they are not needed, rooting themselves in soil intended for better things, for plants more useful, more fragrant, or more beautiful. Thus the corn-cockle bears a fine flower, not unlike the mullein-pink of the garden, but then it springs up among the precious wheat, taking the place of the grain, and it is a weed; the flower of the thistle is handsome in itself, but it is useless, and it pushes forward in throngs by the wayside until we are weary of seeing it, and everybody makes war upon it; the common St. John’s wort, again, has a pretty yellow blossom, and it has its uses also as a simple, but it is injurious to the cattle, and yet it is so obstinately tenacious of a place among the grasses, that it is found in every meadow, and we quarrel with it as a weed.

These noxious plants have come unbidden to us, with the grains and grasses of the Old World, the evil with the good, as usual in this world of probation&mdash;the wheat and tares together. The useful plants produce a tenfold blessing upon the labour of man, but the weed is also there, ever accompanying his steps, to teach him a lesson of humility. Certain plants of this nature&mdash;the dock, thistle, nettle, &c., &c.&mdash;are known to attach themselves especially to the path of man; in widely different soils and climates, they are still found at his door. Patient care and toil can alone keep the evil within bounds, and it seems doubtful whether it lies within the reach of human means entirely to remove from the face of the earth one single plant of this peculiar nature, much less all their varieties. Has any one, even of the most noxious sorts, ever been utterly destroyed? Agriculture, with all the pride and power of science now at her command, has apparently accomplished but little in this way. Egypt and China are said to be countries in which weeds are comparatively rare; both regions have long been in a high state of cultivation, filled to overflowing with a hungry population, which neglects scarce a rood of the soil, and yet even in those lands, even upon the banks of the Nile, where the crops succeed each other without any interval throughout the whole year, leaving no time for weeds to extend themselves; even there, these noxious plants are not unknown, and the moment the soil is abandoned, only for a season, they return with renewed vigour.