CALKING, or Corking
,—is the projecting part erroneously formed at the heels of horse-shoes in general, particularly in frosty weather; at which time their utility may be admitted, and, in fact, cannot be done without, where horses are in frequent use. These calkings, however, cannot be justified upon any scientific principle whatever, without chance of accident to the rider, and of lameness to the horse; for upon level ground the horse cannot move but in a distorted motion; and if the prominence in the shoe comes into immediate contact with a rolling-stone, or a projecting part in the pavement, ligamentary lameness probably ensues. If it is found necessary to bring them into use at all, even in frosty weather, both heels should be equally raised, as there will be much less danger in a double than a single calking.
CALOMEL
—is a medical article, well known by this name as the mildest preparation of mercury: it is in general use in private practice, and a certain specific for the obliteration of worms in HORSES, when added in proper proportions to the ingredients for purging-balls.
CAMPHIRE
—is a vegetable concrete, unctuous to the touch, with a fragrant smell, somewhat like that of rosemary, and a bitter pungent taste, accompanied with a sense of coolness on the tongue. It is volatile, like essential oils, but without their acrimony: it burns in water; it receives no empyreumatic impressions; nor does it suffer any resolution from any degree of fire, to which it can be exposed in close vessels, though readily combustible in the open air. Camphire is known to be good, if, when it is put upon hot bread, it becomes moist; if dry, it is bad. It should be kept in a glass stopper bottle, or close tied in a bladder, not more to prevent it from losing its property, than to prevent the loss of the whole by exhalation. Used as a medicine, internally or externally, it has a narcotic effect, and greatly diminishes the irritability of the system; as an external, it is singularly useful, particularly in weakness, rheumatic pains, or spasmodic affections.
CAMPHORATED SPIRITS
—is a prescription standing in the Dispensatory of the London College of Physicians, and is thus prepared. "Take of camphor two ounces; rectified spirit of wine, one quart; shake frequently till the camphor is dissolved." It is a very useful embrocation in slight strains, as well as to prevent the breaking of chilblains in the winter season.
CAMOMILE.
—The flowers are so useful in fomentations, that no good sportsman in the country should ever be without them in the house.