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Priestley, M. Lavoisier, and other philosophers, it appears, that the basis of atmospherical air, called oxygene, is received by the blood through the membranes of the lungs; and that by this addition the colour of the blood is changed from a dark to a light red.
Hibbert's account of a Natural Rocking-stone; Notices of Fossil Organic Remains discovered within the year; Instructions for collecting Geological specimens, &c. The Astronomical and Meteorological division contains some important observations on Atmospherical Electricity, by Dr.
If, therefore, we consider the peculiar property of the plague, that in countries which it has once visited it remains for a long time in a milder form, and that the epidemic influences of 1342, when it had appeared for the last time, were particularly favourable to its unperceived continuance, till 1348, we come to the notion that in this eventful year also the germs of plague existed in Southern Europe, which might be vivified by atmospherical deteriorations; and that thus, at least in part, the Black Plague may have originated in Europe itself.
There can be little doubt that birds, prior to their migratory movements, are influenced by atmospherical changes, or other physical causes, which, however beyond the sphere of our perceptions, are sufficient for their guidance. That they are not possessed of the power of divination may be exemplified by the following instance.
I can safely assert, that any one of temperate habits, who is not exposed to much bodily exertion, night air, and atmospherical changes, may have as much immunity from disease in St. Helena as in Europe; and I may, therefore, further assert, that the disease of which Buonaparte died was not the effect of climate."
At the time of procreation this speck of entity is received into an appropriated nidus, in which it must acquire two circumstances necessary to its life and growth; one of these is food or sustenance, which is to be received by the absorbent mouths of its vessels; and the other is that part of atmospherical air, or of water, which by the new chemistry is termed oxygene, and which affects the blood by passing through the coats of the vessels which contain it.
It is easy to conceive, therefore, why vapours become visible in the atmospherical strata, which, at a distance from the continent, have no longer the same temperature as when they began to be saturated with water. The considerable mass of a mountain, rising in the midst of the Atlantic, is also an obstacle to the clouds, which are driven out to sea by the winds.
Now this is certainly not the case, since the appearance we are treating of never occurs but under peculiar atmospherical circumstances, and rivers are frequently frozen over, and remain so for a length of time without a particle of ice being visible at the bottom of their streams.
If, therefore, we consider the peculiar property of the plague, that in countries which it has once visited it remains for a long time in a milder form, and that the epidemic influences of 1342, when it had appeared for the last time, were particularly favorable to its unperceived continuance, till 1348, we come to the notion that in this eventful year also, the germs of plague existed in Southern Europe, which might be vivified by atmospherical deteriorations.
He attributes all these appearances, which have been so numerous and so well authenticated as not to admit of doubt, to certain atmospherical deceptions, like that of the Fata Morgana, seen at times, in the straits of Messina, where the city of Reggio and its surrounding country is reflected in the air above the neighboring sea: a phenomenon which has likewise been witnessed in front of the city of Marseilles.
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