§ 146. In 1838 the deaths in the metropolis were nearly 52,000; and for round numbers the average maybe taken as 50,000 annually. Such an amount of mortality would require on the scale proposed by Dr. Riecke, for the several classes of graves, about 48 acres, or a space of nearly the size of St. James’s Park within the rails, annually. On the same scale, supposing the interments generally renewable in decennial periods, the space required for national cemeteries in the metropolis would be 444 acres, or a space coextensive with Hyde Park, which has 350 acres, and the Green Park and St. James’s Park put together; or rather more than one-fourth more than the Regent’s Park, which has 350 acres; or one-fourth less space than the Hyde Park and Kensington Gardens taken together. But besides the spaces for the cemeteries, spaces would be requisite as belts of land surrounding them, and to be kept clear of houses. § 147. The proper distance of places of interment from houses, is calculable according to the number of interments. On this subject there have been some, though not complete observations. There is a church-yard at Stuttgart, in which 500 bodies are interred yearly, at depths varying with the age, according to the scale of regulations stated, with no more than one corpse in each grave, yet a north-west wind renders the emanations from the ground perceptible in houses distant from 250 to 300 paces. The stench of the carrion pits at Montfaucon is almost insupportable to a person not used to it, at a distance of 6500 feet, and with certain winds at double that distance, and under some circumstances even to the distance of five miles. Besides the surface emanations, the pollution of the subsoil drainage and springs have to be regarded. Captain Vetch states, that on some plains in Mexico, where animals have been slaughtered and buried in pits in permeable ground, the effects on vegetation were to be seen along the edges of a brook for a distance of three-quarters of a mile. In some parts they actually slaughtered and buried animals for the purpose of influencing the surrounding vegetation. By the best regulations in Germany, as already stated, wells are forbidden to be sunk near grave-yards, except at certain distances, such as 300 feet. _Ante_, §§ 13, 14. § 148. On such data as have been obtained, the distance of a cemetery ought to vary according to its size, or the number of the population for whom burial is required. The cemetery for a small population of from 500 to 1000 inhabitants, should, Dr. Reicke considers, be not less than 150 paces; for 1000 to 5000 inhabitants, not less than 300 paces; for above 5000, not less than 500 paces. In Prussia, the distance from houses at which cemeteries may be built, is fixed at not less than 500 paces; at Stralsund, in Prussia, at 1000 paces.