Pianoforte playing our medical adviser considers rather hurtful to health. The exertion of the hands and arms, while the position of the body remains nearly immovable, causes a stronger flow of blood to the chest than is natural. The pressure of the points of the fingers, where the nerves are especially sensitive, is apt to be injurious to the nervous system. This is still more the case in practising on instruments on which the strings are pressed down with the points of the fingers, as for instance on the violin; and also, though in a less degree, on instruments the strings of which are twanged with the fingers, as they are on the harp. The practice, however, causes the skin at the finger-ends to harden, and the touch becomes consequently less sensitive. Decidedly hurtful to the nerves is the sensation produced by the friction of the moistened fingers in playing the glass-harmonica and similar instruments. Among the wind instruments blown by being placed to the mouth, those which require a sudden and prolonged retardation of the breath, or a forcible compression of the air in the lungs, are especially liable, by constant practice, to prove injurious to health. The author has much to say on this subject, and he particularly warns against too continuous playing on the oboe, trumpet, horn, trombone, and serpent. As regards the clarionet, its practice, he says, is likely to be injurious on account of the quantity of air which it requires. The player is often compelled to take a deeper inspiration than is natural, and constantly to pay regard to being provided with a supply of air compressed in his lungs. Furthermore, considering that musical performances very frequently take place in artificial light, the eyesight of the musician is apt to be disadvantageously affected. In this respect also the playing on some instruments is more injurious than on others. The Double Bass player, for instance, is compelled, from the size of his instrument, to have the musical notation placed at a greater distance before him than is naturally convenient for his sight, which renders it necessary for him to exert his eyes in an extraordinary degree. Thus much from Sundelin's 'Medical Adviser,' to which the following remarks may be added.