The first extracts present the subjects of the inquiry in their general condition under the operation of several causes, yet almost all will be found to point to one particular, namely, atmospheric impurity, occasioned by means within the control of legislation, as the main cause of the ravages of epidemic, endemic, and contagious diseases among the community, and as aggravating most other diseases. The subsequent extracts from the sanitary reports from different places will show that the impurity and its evil consequences are greater or less in different places, according as there is more or less sufficient drainage of houses, streets, roads, and land, combined with more or less sufficient means of cleansing and removing solid refuse and impurities, by available supplies of water for the purpose. Then will follow the description of the effects of overcrowding the places of work and dwellings, including the effects of the defective ventilation of dwelling-houses, and of places of work where there are fumes or dust produced. To these will be added the information collected as to the good or evil moral habits promoted by the nature of the residence. These will form so many successive sections of the report, and will be followed by information in respect to the means available for the prevention of the evils described, and an exposition of the present state of the law for the protection of the public health, and of modifications apparently requisite to secure the desired results. I.—GENERAL CONDITION OF THE RESIDENCES OF THE LABOURING CLASSES WHERE DISEASE IS FOUND TO BE THE MOST PREVALENT. The following extracts will serve to show, in the language chiefly of eye-witnesses, the varied forms in which disease attendant on removable circumstances appears from one end of the island to the other amidst the population of rural villages, and of the smaller towns, as well as amidst the population of the commercial cities and the most thronged of the manufacturing districts—in which last pestilence is frequently supposed to have its chief and almost exclusive residence. Commencing with the reports on the sanitary condition of the population in Cornwall and Devon, _Mr. Gilbert_, when acting as Assistant Commissioner for those counties, reports, that he found the open drains and sewers the most prominent cause of malaria. He gives the following as an instance of the common condition of the dwellings of the labouring classes in Devon, where it will be observed that the registered deaths from the four classes of disease amounted in one year to 5893 cases. “In Tiverton there is a large district, from which I find numerous applications were made for relief to the Board of Guardians, in consequence of illness from fever. The expense in procuring the necessary attention and care, and the diet and comforts recommended by the medical officer, were in each case very high, and particularly attracted my attention.