There is a certain standard by which we measure the physical and mental development of children. This standard we regard as the evidence of normal development. Some children exceed these requirements; they are bigger and stronger at a given age than the average child at the same age. There are other children who cannot be called sick, but who are physically and mentally inferior to the average standard, whom we designate as "delicate." These children are not as big, or as strong, or as heavy, as other children of the same age. They are born with a reduced vitality, or through mismanagement in early infancy they have acquired a subnormal standard of development. Children born of parents who are not of standard vitality are predisposed to be delicate. If the parents are of average development, and the delicacy of the child is acquired by mismanagement, the proper dietetic and hygienic management will, as a rule, promptly result in a satisfactory restoration to normal health. TREATMENT.--When a mother awakes to the knowledge that her child is delicate; when she understands that her child's vitality is not what it should be, and when she resolves to "do something" in the interest of her child, she is on the right road, and we hope to encourage her in the good intention. We would however tell her that her effort must be thorough, and that she must be patient and persevering. If she does not falter in well doing she will succeed beyond her expectation, and the satisfaction she will experience in noting the evidences of returning health and strength in the appearance and conduct of her child, should be ample recompense for the effort made and the time bestowed. She must begin with a definite knowledge of just what she intends doing; she must know, however, what must be done and she must begin at the beginning and build from a sure foundation. It is therefore absolutely essential to ascertain if there is any actual disease underlying the reduced vitality which is responsible for the delicacy of the child; this necessitates a thorough examination by a competent physician. If you are assured there is no disease present, no tuberculosis, no syphilis, no malaria, and that debilitating conditions, such as adenoids, sexual abnormalities, the results of self-abuse, skin disease, do not exist, then certain fixed rules can be laid down, and definite principles followed in the daily management. WEIGHT, AS A STANDARD OF DEVELOPMENT.--It has been stated elsewhere in this book that one of the safest guides to follow, as to whether a child is thriving, is its weight. This can be relied upon as a general rule. A child should therefore be weighed regularly every week. If it is not gaining an average of four ounces weekly it is not thriving up to standard. When the average is below four ounces there is something wrong with the quality or quantity of the food.