If such a child is at the sea-side, advantage should be taken of this circumstance, and seabathing should be substituted. The best time is two or three hours after breakfast; but he must not be fatigued beforehand, for if so, the cold bath cannot be used without danger. Care must be taken that he does not remain in too long, as the animal heat will be lowered below the proper degree, which would be most injurious. In boys of a feeble constitution, great mischief is often produced in this way. It is a matter also of great consequence in bathing children that they should not be terrified by the immersion, and every precaution should be taken to prevent this. The healthy and robust boy, too, should early be taught to swim, whenever this is practicable, for it is attended with the most beneficial effects; it is a most invigorating exercise, and the cold bath thus becomes doubly serviceable. PLAN TO BE PURSUED WITH THE DELICATE AND STRUMOUS.--If a child is of a delicate and strumous constitution, the cold bath during the summer is one of the best tonics that can be employed; and if living on the coast, sea-bathing will be found of singular benefit. The effects, however, of sea-bathing upon such a constitution must be particularly watched, for unless it is succeeded by a glow,--a feeling of increased strength,--and a keen appetite, it will do no good, and ought at once to be abandoned for the warm or tepid bath. The opinion that warm baths generally relax and weaken, is erroneous; for in this case, as in all cases when properly employed, they would give tone and vigour to the whole system; in fact, the tepid bath is to this child what the cold bath is to the more robust. In conclusion: if the bath in any shape cannot from circumstances be obtained, then cold saltwater sponging must be used daily, and all the year round, so long as the proper reaction or glow follows its use; but when this is not the case, and this will generally occur, if the child is delicate and the weather cold, tepid vinegar and water, or tepid salt water, must be substituted. Sect. VI. CLOTHING. IN INFANCY.--Infants are very susceptible of the impressions of cold; a proper regard, therefore, to a suitable clothing of the body, is imperative to their enjoyment of health. Unfortunately, an opinion is prevalent in society, that the tender child has naturally a great power of generating heat and resisting cold; and from this popular error has arisen the most fatal results. This opinion has been much strengthened by the insidious manner in which cold operates on the frame, the injurious effects not being always manifest during or immediately after its application, so that but too frequently the fatal result is traced to a wrong source, or the infant sinks under the action of an unknown cause.