_The excessive use of grease_ in dressing the hair, is a common error which cannot fail to be productive of injurious consequences. There is a natural oil secreted by the hair which in a healthy state should supply the requisite amount of moisture; sometimes this is defective, and the hair becomes dry and harsh, it is then proper to supply the deficiency by a little pomatum or oil. When the artificial grease is applied in excessive quantities, it produces a matting of the hair, prevents the pores of the scalp from acting freely, and thus the proper supply of natural moisture is not communicated freely to the hair. _The kind of grease to be used_, should be animal fats in preference to vegetable oils, the latter being apt to become rancid, and not possessing such active stimulant properties as the former. _The use of soap_ in washing the hair, should be cautiously and sparingly observed, as it is apt to change the colour and texture of the hair. A little white soap dissolved in spirits of wine is more effectual and less injurious than soap alone. After this the hair should be well washed with pure water. When _grayness of the hair_ shows itself, it is and indication of want of tone in the hair-producing organs, and if this tone can be restored, the hair will cease to change, and at the same time further change will be prevented. The plan of cutting, as previously recommended, combined with judicious plucking, tends very much to prevent the extension of grayness. _Keeping the head too much covered_ is calculated to prove injurious to the hair, as by this means an excessive amount of heat is generated, which tends to enervate and relax the hair-producing organs, and consequently weaken and thin the hair; for this reason the wearing of nightcaps is to be condemned, and the practice of wearing the hat throughout the day is attended with similar evil consequences. _Curling the hair_, especially when frequently resorted to, is a most pernicious custom—the inordinate amount of heat that is employed to produce the desired effect, drying up the natural oils, and otherwise injuring the roots and texture of the hair.