We call a baby a little copy of the man, but really if he were magnified to man’s size and strength, we should regard him at first glance as an idiot and monster, with enormous head and abdomen, short legs, and no neck, not to speak of the flat-nosed, prognathous face; and on the other hand, a baby that was really a small copy of man’s body would seem positively uncanny. We see this in old pictures, where the artist tried to depict babies by placing small-sized men and women in the mother’s arms. The middle point of the baby’s length falls a little above the navel, the abdomen and legs together making up a little more than half the whole length; in the man the legs alone make a trifle more than half. In proportion to the baby’s total weight, its brain weighs seven times as much as a grown person’s, its muscles little more than half as much. “The two [man and baby] do not breathe alike, their pulse rates are not alike, the composition of their bodies is not alike.” The baby’s body at birth is 74.7 per cent. water, ours 58.5 per cent. It is largely due to its loose, watery structure that the baby’s brain is so heavy--which shows the folly of trying to compare mental powers by means of brain weights, as is so often done in discussing woman’s sphere. As Donaldson says, if there were anything in that basis of comparison, the new-born baby would be the intellectual master of us all. The baby has bright red and watery marrow, instead of the yellow, fatty substance in our bones; and its blood differs so from ours in proportion of red and white corpuscles and in chemical make-up as to “amount almost to a difference in kind,” says Dr. Oppenheim, who adds that such a condition of marrow or blood, if found in a grown person, would be considered an indication of disease. The organs are differently placed within the body, and even differently formed. The bony structure is everywhere soft and unfinished, the plates of the skull imperfectly fitted together, with gaps at the corners; and it is well that they are, for if the brain box were closed tight the brain within could never grow. Surgeons have lately even made artificial openings where the skull was prematurely perfect, to save the baby from idiocy. The bony inclosures of the middle ear are quite unfinished, so that on the one side catarrhal inflammations from the nose and throat travel up to the ear more readily than in later life, while on the other side ear inflammations are more likely to pass into the brain. The spine is straight, like an ape’s, instead of having the double curve of human-kind, which seems to be brought about by the pull of the muscles after we have come to stand erect.