Mr. Chadwick and Dr. Richardson obtained some statistics for Westminster, for the use of a committee of the Society of Arts, which indicate the very different conditions of health to which the different classes of population are subject. It appeared from these statistics that out of one hundred deaths of the first class, or gentry, six were those of children in their first year, and nine of children within their fifth year; while out of one hundred deaths of the wage classes twenty-two are those of children in their first year, and thirty-nine within their fifth year. If we take the average duration of life of all who have died of the first class, men, women, and children, we find that they have had an average of fifty-five years and eight months of life; while of the wage classes they have had a mean of only twenty-eight years and nine months. And if we take the average duration of life of those who have escaped the earlier ravages of death up to twenty years of age, the males who have died of the first class have had sixty-one years of life, while of the wage class the males have had only forty-seven years and seven months. Moreover, of the first class in Westminster, the proportion who have attained the old age, and died of natural causes, is 3.27 per cent., but of the wage classes only a fraction, or two-thirds per cent., did so. I have obtained similar returns for this town. It was considered desirable, for the purpose of this return, to divide the population into the following five classes: First, gentry and professional men; second, tradesmen and shopkeepers; third, shipwrights, chain and anchor smiths, iron forge laborers, etc., fourth, seamen, watermen, fishermen, etc.; fifth, other wage clashes and artisans; and each of these classes represents distinct sanitary conditions and habits of life. The healthiest class is that of the seamen, watermen, and fishermen. The mean age at death of all who died of that class, men, women, and children, is thirty-seven years, as compared with thirty five years for gentry and professional men; while the mean age of shipwrights, chain and anchor makers, and iron forge laborers is only twenty-two years. The President considered that these points gave much food for reflection. He then touched upon the important question of the effect of occupation upon health, and remarked: If we take the professional and merchant class, who attend at their offices during the daytime, we may be sure that, as a rule, they are placed in unhealthy surroundings during that time, and in many cases have to breathe during their hours of work as bad an atmosphere as that in which the wage classes work. He also quoted returns showing that the great mortality among the tradesmen class in Westminster was explained from the fact that the best rooms in the houses in which they live were let for lodgings, the tradesmen contenting themselves with living in the basements or back premises, which were frequently unhealthy. He looked