The infant at the breast is seldom, if ever, the subject of this disorder, whilst an artificial diet, or bringing up by hand, predisposes to it. Worms most frequently occur, however, during childhood; much more so at this epoch than in adult age. They do not invariably occasion indisposition, for they are now and then passed without pain or distress by children who are in the enjoyment of perfect health, and in whom previously there was not the slightest suspicion of their existence. The idea, formerly so prevalent, of their being attended with danger, is without foundation; for unless the case be mismanaged, they rarely give rise to serious consequences. HOW PRODUCED, AND HOW BEST PREVENTED.--The causes of worms it is not very easy to explain; at the same time it is very certain that some known circumstances favour their production. If the general health of a child be enfeebled, particularly if the child be strumous, such a condition will favour the generation of these animals. The protracted use of unwholesome and innutritious articles of food, or a deficient supply of salt (the most necessary stimulant to the digestive organs), or other condiments, predisposes to worms. This observation is strikingly illustrated by an occurrence which formerly took place in Holland, where an ancient law existed forbidding salt in the bread of certain criminals; they were in consequence horribly infested with worms, and quickly died. Sugar, too, whilst a necessary condiment for the food of children, if given in the form of sweetmeats, and their indulgence, long persisted in, may so enfeeble the organs of digestion as to cause worms. And, lastly, (though many other causes might be referred to) the injudicious means occasionally employed to effect the removal of these animals, by the debility produced in the intestinal canal, favours not only their re-appearance but their increase. These, then, are so many causes which may occasion worms in the child, and of course the best and most effectual method to prevent their production is their avoidance. A mother, therefore, should at all times be careful in the regulation of the diet and general management of her child's habits and health, even if no stronger obligations existed than the dread of this disorder; and she must be more than ordinarily vigilant on this head, when the slightest disposition to such disorder is manifested. Again; she must not forget that the symptoms so commonly ascribed as characteristic of worms are much more frequently caused by other diseases; that at no time, therefore, is she justified in giving worm powders, or strong doses of medicine for such symptoms; for if they do exist, their use is always attended with risk, and if they do not, the debility which they occasion in the stomach and bowels may itself become the source of their production. Sect. V. SCARLET FEVER.