The dangers of inhaling the atmosphere of churches or chapels under which burial-vaults are made use of or interments made, have been repeatedly pointed out.[107] In other lands besides our own have these dangers been suspected and detected. The Tuscan Government requested Signor Piattoli to thoroughly investigate the subject, and his report has been confirmed by eminent men of various nations. As having taken place in our own land, Dr. Copeland mentions the case of a gentleman who was poisoned by a rush of foul air from the grated openings on the sides of the church steps, and who died from a malignant fever in a few days' time, communicating the same to his wife with a fatal result. The same fever has been known to seize pew-openers when cleansing and shaking the mattings of the floor. After a vault had been opened, the smell was at times overpowering. It was the opinion of Mr. Chadwick, after examining some hundreds of witnesses of all kinds, that entombment in vaults was a more dangerous practice than interment in the earth, because of the liability of the coffins to burst.
[107] 'In vaults the air contains much carbonic acid, carbonate or sulphide of ammonium, nitrogen, hydrosulphuric acid, and organic matter. Fungi and germs of infusoria abound.'--Dr. Parkes, 'Practical Hygiene,' 4th ed.
We may, therefore, for our purpose, assume that, even under the most favourable circumstances, hurtful emanations must perforce rise out of burial-grounds, there being no more natural escape for the gases of decomposition than by levitation. These gases will rise to the surface through eight or ten feet of gravel, just as coal-gas will do, and there is practically no limit to their power of escape. The danger is always persistent in the cases of dry and porous soils, exactly those which are most fitted for cemetery purposes. In a churchyard at Stuttgart, in which only five hundred bodies were interred yearly, and not more than one in each grave, the north-west wind rendered the emanations from the dead perceptible in houses two hundred and fifty paces distant. It will thus be seen that the soil best fitted to ensure decay is exactly the worst one for neighbouring houses. Unless there can be some artificial means taken to bring about the slow combustion of these gases, as, for instance, by layers of charcoal, the gases must continue to escape in a foul condition. But who would recommend so extraordinary a procedure as this?