Note 104 — Chapter IV
Reading edition
'The decomposition of bodies gives rise to a very large amount of carbonic acid. Ammonia and an offensive putrid vapour are also given off. The air of most cemeteries is richer in carbonic acid (·7 to ·9 per thousand—Ramon de Luna), and the organic matter is perceptibly large when tested by potassium permanganate.'—Dr. Parkes, 'Practical Hygiene,' 4th edit. 1873.