"What do we accomplish by inoculation as it is called? Simply this. We take on the top of a lancet, or an ivory point, a few of these minute cells or germs, and we put them _in their appropriate nidus_, the subcuticular tissue, where, after a few days if they find their appropriate nutrient elements, they grow and multiply." Simon, Chemistry of Man, vol. i. p. 127. "Macgregor ascertained that the air expired by persons ill of confluent Small Pox, contained as much as _eight_ per cent of carbonic acid, and in proportion as health was restored the percentage was diminished to its natural standard." Carbonic acid is also produced during the process of fermentation and germination. [13] See History of the Jews, p. 71. [14] It is said by Whewell, that the murrain is supposed to have fallen only on the animals which were in the open pasture.--_History of the Jews._ "J. S. Michael Leger, published at Vienna, in 1775, a treatise concerning the mildew as the principal cause of the epidemic disease among cattle. The mildew is that which _burns_ and _dries_ the grass and leaves. It is observed early in the morning, particularly after _thunder-storms_. Its poisonous quality, which does not last above twenty-four hours, never operates but when it is swallowed immediately after its falling."--_Mitchell on Fevers._ [15] "The prevalence of the south-east wind was observed to be particularly favourable to the increase of both cholera and influenza: and I cannot but think that this had some connexion with the general tendency exhibited by the former to spread from east to west. Has the morbific property of this wind aught to do with the haziness of the air when it prevails--a haziness seen in the country remote from smoke, and quite distinct from fog? What is this haze? In the west of England a hazy day in spring is called a _blight_."--_Dr. Williams' Principles of Medicine._ [16] We are to understand also that some peculiar operation took place of a nature difficult to comprehend, which seems also to typify reproduction, for the handfuls of ashes which Moses threw into the air _became a dust in all the land of Egypt_, thus signifying an enormous reproduction of atomic matter. [17] The Chinese affect to trace the origin of Small Pox back to a period of at least 3000 years, or 20 years beyond the era of the Trojan war, 1212, A. C. The Chinese pretend to discriminate no less than 40 different species of Small Pox. "They also pretend to discover whether a person has died by violence or from natural causes, not only after the body has been some time interred and decomposition of the softer parts has commenced, but even after the total disappearance of the soft parts, and when the dry skeleton alone is left."--For the process, see _Hamilton's History of Medicine_, vol. i. p. 31.