We conceive that there have been much fewer cases of consumption on the club since this practice has been adopted.” The effects of the noxious physical agencies on the moral condition of the population will receive more full illustration in connexion with the statistical evidence as to their effects, with the evidence on the practical operation of the means of prevention. _Domestic mismanagement, a predisposing cause of disease._ The subsequent examples relate chiefly to the effects of general domestic mismanagement as a concurrent cause of disease. _Dr. Baker_, in his report on the sanitary condition of the population of Derby, states that— “There is also another cause of sickness to be found in their houses, and which, like the former, _i. e._, the external circumstances, is in constant operation: I mean the want of domestic comforts, a want which the wages they earn would, in many instances, enable them to remove if their means were not, as too often happens, expended viciously or improvidently. It is with regret that I speak unfavourably of the poor, whilst my whole aim, in this communication, has been to awaken a sympathy towards those sufferings of which I have been so often a witness. But several years’ experience of the habits of the poor, derived from my situation as an hospital physician, and backed by the additional evidence I have obtained by acting for three years as a guardian of the poor in this large town, has, I am sorry to say, served but to confirm me in the opinion I have just now expressed; and in support of which I shall instance the family of the Slaters mentioned at No. 12, in Short-street. “The earnings of four members of this family were as follows:— _s._ _d._ The father 14 0 per week, at gardening, &c. The eldest son, aged 20 12 0 per week, at a brewery. Daughter {Twins, } 6 0 per week, at a factory. Son {aged 18} 9 0 per week, at the same factory. —— —— — £2 1 0 per week. “The mother of this family, it appears, is left disengaged from all but her household duties and the care of the younger children; the house, nevertheless, is nearly destitute of furniture, and presents a picture of disorder and want. On the other hand, at No. 15, (Briggs) although the husband has for some years past been a weak and ailing man, the family is well ordered and cleanly; and to this fact I mainly attribute the milder and modified form of fever which affected the children.” The Committee of Physicians and Surgeons at Birmingham, in their report, indicate the powerful operation of depraved domestic habits as a predisposing cause to disease:—