On Impetigo Contagiosa, or Porrigo

with syphilitic iritis, having its usual characteristic marks-effusion of lymph, adhesion of the iris, dimness of vision, etc.He was ordered to have two grains of calomel and one-third of a grain of pow- lered opium every six hours.The effect of the mercury was soon visible on the vessels of the iris.Its natural colour was restored; the cornea became clear aoain; the red zone around it faded away; effused lymph was absorbed; and -vision again restored.He was now ordered three grains of iodide of potassium and an ounce of infusion of quassia three times a day, and was discharged cured in twenty-seven days.As syphilis, in some of its worst forms, comes under treatment from time to time in the wards of this hospital, the value of mercury as a remedy is fairly tested; and well-grounded opinions, founded on ex- perience, can be given in its favour.If those who argue against its use had an opportunity of studying syphilis in the wards of a lock hospital, or if attendance at those institutions formed part of the curriculum of the medical student, we should not have such divided opinions now-a-days upon the best mode of treating this disease.Men of great experience hold that mercury is a specific for syphilis; but they keep aloof from a controversy of mere words, when theory is more relied upon than facbs.The only remedy for this chaos of opinions on a question of such vital im- portance to the health, and, it may be justly acdded, the well-being of the people of this country, is the establishment of a special school of instruction for 'venereal diseases, the want of which must now be apparent to every thinking man in the profession.CASE OF :HIEATURIA.