6. _Changes in the skin._--The alterations occurring in the skin are worth observing. Those women who have a delicate complexion and are naturally pale take a high color, and vice versâ. In some cases a considerable quantity of hair appears on those parts of the face occupied by the beard in men; it disappears after labor, and returns on every subsequent pregnancy. Oftentimes the skin becomes loose and wrinkled, giving a haggard, aged air to the face, and spoiling good looks. Women who ordinarily perspire freely, have now a dry, rough skin; whereas those whose skin is not naturally moist, have copious perspiration, which may be of a peculiarly strong odor. Copper-colored or yellow blotches sometimes appear upon the skin, mole spots become darker and larger, and a dark ring developes itself beneath the eyes. The whole appearance is thus in many cases altered. On the other hand, obstinate, long-existing skin affections sometimes take their departure during pregnancy, perhaps never to return. These alterations do not occur in all women, nor in all pregnancies of the same woman. 7. We may now group together a number of less important and less constant signs, such as _depraved appetite_, _longings for unnatural food_, _excessive formation of saliva in the mouth_, _heartburn, loss of appetite_ in the first two or three months, succeeded by a voracious desire for food, which sometimes compels the woman to rise at night in order to eat, _toothache_, _sleepiness_, _diarrhœa_, _palpitation of the heart_, _pain in the right side_, etc. These, when they occur singly, are of little value as evidence. Among these, that of _depraved appetite_ is by far the most important, and may be regarded as quite significant. A married woman in her ordinary health, suddenly feeling this morbid taste for chalk, charcoal, slate pencil, and other unusual articles of food, may look upon it as a strong presumptive evidence of impregnation. When any or all of this group of symptoms accompany the ceasing to be 'regular,' the morning sickness, the changes in the breasts and the other signs which have been enumerated, the wife may be quite sure that she is pregnant. 8. _Changes in the mind._--The most wonderful of all the changes which attend pregnancy are those in the nervous system. The woman is rendered more susceptible, more impressible. Her character is transformed. She is no longer pleasant, confiding, gentle, and gay. She becomes hasty, passionate, jealous, and bitter. But in those who are naturally fretful and bad-tempered a change for the better is sometimes observed, so that the members of the household learn from experience to hail with delight the mother's pregnancy as a period when clouds and storms give place to sunshine and quietness. In some rare cases, also, pregnancy confers increased force and elevation to the ideas, and augmented power to the intellect.