The most frequent form of eruption is the scaly, and called syphilitic lepra. It is characterized by dry, flat, and round patches, of different sizes, and of a coppery-red color. Each spot is ushered in by a minute but hard elevation of a purplish hue, that gradually radiates in size until it acquires its limit. It then puts on a scaly appearance, and, as it desquamates, with the exception of the centre, which is sometimes left white, maintains its copper color. These patches may be distinguished from ordinary leprosy by their color, and their running on to ulceration, if uncontrolled by medicine, and again by their more speedily yielding to judicious treatment; when they become paler in appearance, cease to exfoliate, and die away, leaving, however, a coppery stain. Syphilitic eruptions occur in all parts of the body, and are to be observed on the head, face, back, legs, feet, hands, scrotum, &c. (see wood-cut, page 118), but they are much modified in their external characters by the region they affect. The pustular form of syphilitic eruption is also illimitable as to situation and extent. The pustules, at the onset, are scarcely to be distinguished from the patches of lepra, being of similar color. They differ in size, some being very large, and others very small. When they have existed about a week, a purulent fluid escapes, which hardens and crusts, constituting a conoid tumor, and surrounded by a copper-colored areola. This crust after a while drops off, leaving the under surface of the same teint as the margin. The pustular form of the disease is mostly consecutive to primary infection of the genital organs, and is often complicated with affections of the throat, nose, &c. Syphiloid tubercles ordinarily attack the face, more particularly the nose, angles of the lips, ears, &c. They vary in size, are dispersed or grouped together, and are of a purplish copper color. Like the pustular, they terminate in ulceration, which on healing leaves an indelible scar. This and other forms of syphilitic disease are very irregular in their attacks, first selecting one spot, then another, then several together, so that the body presents often at the same time many stages of the eruption. The papular form of eruption is generally intermixed with the pustular and tubercular. It is less strongly marked, but, like the others, successive in its development, and usually complicated with primary symptoms. There is a form of cutaneous disfigurement, entitled syphilitic exanthema, in which the skin is discolored by coppery-red blushes that disappear under pressure of the finger. There are also deep and painful fissures and excrescences, called _vegetations_, from their resemblance to raspberries, strawberries, cauliflowers, and leeks, observed in syphilis, and most commonly they are to be found about the lips, nose, eyebrows, chin, genitals, &c.