There is also a large dark worm comes from horses, having a black head, and in its formation precisely the same as the grub-worm, so destructive to the roots of strawberries in certain dry seasons; but that these are of a cream coloured white, and the former of a brownish yellow, which tinge may probably be derived from the excrements in which they have been ingulfed. A third is the long white worm, from six or seven to fourteen inches long, equally picked at both ends, but larger in circumference towards one end than the other; these are prolific in the body beyond description, and when completely dislodged by medical specifics, are evacuated in putrified masses exceeding credibility. The fourth are a greenish small worm, with a perpetual vermicular motion, which, by its continual twisting and twirling in the intestinal canal, so irritates the animal, that he sometimes evacuates suddenly, and in a state so lax, that these worms are frequently expelled with the dung in great numbers, and seen working in all directions upon its surface, exactly similar to the exertions of an eel when thrown upon the grass from its native element. Numerous are the quackeries and nostrums recommended by the _il-literati_, from old books, and unenlightened practice, long since buried in oblivion; but more particularly since the discovery of those grand specifics, MERCURY and ANTIMONY, which may be comparatively said to contain an equal degree of merit with the remaining conjunctive parts of the whole Materia Medica. After all the various experiments made, and minute observations collected, it does not appear that any mode, but mercurial purgation, will be productive of actual and infallible extirpation. Instances are numerous, where they have been evacuated in large quantities (and in many cases completely eradicated) by the advertised Antimonial Alterative Powders of the Author; but MERCURIALS are certainly entitled to priority, upon the well-founded plea of infallibity. Worms are as common with dogs as with horses, and may as certainly be cured by the same proportional means.