The greater degrees of rickets are scarcely ever seen among the children of the wealthier classes, but over-crowded and ill-ventilated nurseries, cots from which the air is well-nigh shut out by closed sides and overhanging curtains; injudicious feeding, with undue preponderance of farinaceous food, often produce its slighter forms. I never yet saw rickets in a child while brought up exclusively at its mother's breast. The slighter forms of rickets show themselves in a tardy closure of the infant's head, which sweats profusely when the child is laid down to sleep; in big wrists, which contrast with the attenuated arms; in a general limpness of the whole body, and a bowing of the back under the weight of the head, which bends as a green stick would bend if a weight were placed upon it. They are further marked by backwardness in teething, and by the irregular order in which the teeth appear, and, further, by the peculiar narrowness of the chest, and by what has been termed the beading of the ends of the ribs: little round prominences due to a heaping up of gristle just where the ribs join on to the breastbone, marking the spots at which the tardy bone-making has come to a standstill. Children who bear these stamps of rickets are far more apt than others to suffer from spasmodic croup, and in them it is also specially likely to be severe and to be accompanied by convulsions. They will also be more liable than others to attacks of bronchitis, they will suffer more during teething, they will be often constipated, and will be troubled by various forms of indigestion. Now and then, too, they will have causeless attacks of feverishness lasting for a few days, or for two or three weeks, attended with general tenderness of the surface, and a disposition to perspiration, which brings no relief but serves only to weaken. It is true that these symptoms do not often become immediately dangerous to life, though spasmodic croup and bronchitis both have their perils; but they interfere with health, and growth, and good looks, and cheerfulness, and quick intelligence. If mothers would but ask themselves the real signification of these symptoms, and change the conditions which surround the child, and alter their mode of feeding it, they would many and many a time be spared the heart-ache of seeing their little ones grow up weakly, ugly, ill-thriven. Unfortunately, it is so much easier to give cod-liver oil and iron than to turn the best spare room into a night nursery, and to uglify the cot by taking away the curtains which made it so pretty, and to give up some of the pleasures of society in order to superintend the preparation of the baby's food; that the doctor is called in to correct by drugs the evil which drugs cannot reach. Iron and cod-liver oil are very useful in the second place; fresh air, good ventilation, and a wise diet must always occupy the first.