+Tertiary Syphilis.+ These symptoms appear from one to two years after contagion and may continue to break out from ten to fifteen years, or more. The characteristic lesions are certain late eruptions on the skin, periostitis and nodes on the bones, and growths in the subcutaneous tissue, muscle, and viscera, especially the liver and spleen. These growths, in the viscera and other parts, which are so characteristic of syphilis in its later stages, are known as gummata. They consist of a substance like granulation tissue, with a varying proportion of cells. In early stages they are grayish, gelatinous, and transparent, but the cells undergo fatty change and caseation takes place, so that the centre becomes yellow, and the circumference develops into fibrous tissue, which contracts like a scar tissue. Sometimes gummata break down completely, and suppuration, with destruction of the tissues in which they are situated, takes place; thus caries and necrosis not infrequently follow nodes on the bones. +Treatment.+ Mercury is the drug of great benefit in syphilis. This can be administered either internally, by inunction, or by injection. Of all the preparations to be given internally, protiodide of mercury, in one quarter grain doses, three times a day, is to be preferred. +Inunction+ represents the most efficient way of administering the mercurial treatment, when the stomach is intolerant of drugs, or when administered by the mouth in full doses, they do not favorably modify the symptoms. The patient is instructed to take a warm bath, and the mercury is then well rubbed in over the inner surface of the forearm and arm and alongside of the chest for fifteen minutes. Either the oleate of mercury, 10 per cent., or the ordinary mercury ointment is commonly employed; the former is more clean, but less efficient. The rubbings should be done by the patient, should be made over a large surface of the body, and should be performed thoroughly; one dram (4.0) of blue ointment is rubbed in daily. For the injections, a 10 per cent. salicylate of mercury in olive oil is to be preferred; 10 to 15 minums of this solution is to be injected into the buttocks, three times a week. The dose is gradually to be increased until 30 drops are employed. Recently salvarsan (606) in 0.6, or 10 grain doses is given either intravenously or intraspinally. Neosalvarsan (914) is to be similarly given. The latter has the advantage in that sterile water is used, and that, as a rule, there is no reaction from its injection. Iodide of potassium in large doses (60 to 90 grains) three times a day, is also to be given. +Tuberculosis.+ Tuberculosis is an infectious disease due to the deposition and multiplication of the tubercule bacillus in the tissues of the body. It is characterized either by the formation of tubercules, or by a wide spread infiltration, both of these conditions tending to caseation, sclerosis, or ulceration. A tubercular lesion may undergo calcification.