DRESSING THE HAIR.-- In the front of the number, we give two engravings of new styles of dressing the hair.  As a general rule, the hair is now more elaborately arranged than ever.  Since the arrival of the Princess of Wales in England, many young ladies there have adopted her Royal Highness' style of dressing her hair; and the fashion is being initiated here.  It is carried off the temple a V Imperatrice, and with two long ringlets behind the ear which fall on to the neck.  This is a comparatively simple style, but a more elaborate and equally fashionable way is the Marie Antoinette style.  This is arranged by turning back the front hair a V Imperatrice, so as to form a rouleau at the sides; to divide the hair so as to make a point in front upon which the bouquet of flowers is placed, and from the point to arrange flat small curls upon the forehead, which gradually increase in size until they terminate in ringlets which fall below the ear.  Another style is to erect three rouleaux of hair, one above the other, at each side of the head; to place a bow of ribbon or a bouquet of flowers in the center, on the plain space between the scaffolded hair, and then to arrange bows of hair and ringlets to fall  low at the back.  A simply arranged head of hair is now rarely to be seen.