NEEDLE-WORMS—are small white worms with a sharp-pointed head, having their seat in the rectum of a horse, from whence they are frequently discharged with the dung, but are difficult to dislodge and extirpate entirely. By their unceasing action, (twirling and twisting in the dung when expelled,) it is natural to conceive, how very much they irritate, disquiet, and distress an animal where they have acquired possession; of this there needs no greater proof, than the excrements frequently and suddenly coming away in a liquified state, as if the horse was under a course of physic. And this is evidently the cause why horses eternally teazed and persecuted with these diminutive enemies, always appear low in flesh, rough in the coat, sunk in the eyes, and depressed in the spirits: eternally labouring under internal disquietude, they derive but little advantage from REST, or nourishment from FOOD. They are sometimes not only reduced, but eradicated, by ANTIMONIALS; but as this is not always to be relied on, MERCURIAL PHYSIC is justified upon the broad basis of experience, as the only _infallible_ mode of extirpation. NEIGHING—is an exclamatory sensation (or vociferation) by which the horse evinces either anxiety, suspense, or pleasure; but the passion he feels is expressed with much more force and energy in the two first, than in the latter, which is ejaculated with low and gradual vibrative sounds, too expressive to be mistaken by even the inexperienced naturalist, or least attentive observer. Being separated from a companion with whom he has been accustomed to stand in the same stable, and to accompany each other abroad, his inquiries are loud and incessant upon the road or in the field; and if made upon a RACE COURSE, amidst a _thousand_ horses, they are so completely masters of their _own language_, that they can instantly distinguish the exclamation of _each other_ from the innumerable NEIGHINGS of all the rest. Finding themselves answered, at whatever distance, they display their eagerness to get together; and as they approach each other, the pleasure becomes perceptible in the way before described, and by the experienced sportsman so perfectly understood.