According to the phlogistic theory, the part remaining after a substance was burned was simply the original substance deprived of phlogiston.
From all these analogies I think there can be no doubt but that leaves of trees are their lungs, giving out a phlogistic material to the atmosphere, and absorbing oxygen, or vital air.
It will be seen from this that the phlogistic theory was a step towards chemistry and away from alchemy.
Its supporters disagreed among themselves, first as to the explanation of certain phenomena that did not seem to accord with the phlogistic theory, and a little later as to the theory itself.
At the hands of Stahl and his school, the phlogistic theory, by exhibiting a fundamental similarity between all processes of combustion and by its remarkable flexibility, came to be a general theory of chemical action.
It thus happened that in the earlier treatises onphlogistic chemistry organic substances were grouped with all combustibles.
Scheele, although they isolated oxygen, were fogged by the phlogistic tenets; and H.
During the phlogistic period, the detection of the constituents of compounds was considerably developed.
The theory advocated by Lavoisier came to displace the phlogistic conception; but at first its acceptance was slow.
Whatever will unite with pure air, and thence compose an acid, is esteemed in this ingenious theory to be a different kind of phlogistic or inflammable body.
On the ruins of the phlogistic theory arose the theory of oxygen, which was sustained with singular ability.
The phlogistic theory, introduced by Beccher and perfected by Stahl, created chemistry, in contradistinction to the Arabian alchemy.
Boyle, who does not seem to have been aware of the phlogistic theory, though it had been broached before his death, relates an experiment on tin which he made.
It will be requisite, therefore, before proceeding further with this historical sketch, to lay the outlines of the phlogistic theory before the reader.
The phlogistic school being thus founded by Stahl, in Berlin, a race of chemists succeeded him in that capital, who contributed in no ordinary degree to the improvement of the science.
Lavoisier found great difficulty in making his opinions clear because he was obliged to use a language which had been introduced by the phlogistic chemists, and which bore the impress of that theory on most of its terms.
He then states the phlogistic interpretation of these phenomena: that combustion is caused by the outrush from the burning body of a something called the principle of fire, or phlogiston.
The phlogistic theory, which had tyrannized over chemistry, had been succeeded by the Lavoisierian chemistry, which recognized one acidifier, and this also the one supporter of combustion.
He concludes with an admirable contrast between the phlogistic theory and the theory of Lavoisier, which shows how wide, and at the same time how definite, his conceptions were.
The phlogistic theory however maintained its ground; we shall find that it had a distinct element of truth in it, but we shall also find that it did harm to scientific advance.
Stahl (the founder of the phlogistic theory) added that of combining with acids.
This reproduction is due, according to the phlogistic chemists, to the giving back, by carbon, of the phlogiston which had escaped during the burning.
But the phlogistic chemistry was not yet overthrown.
Paracelsus strongly insisted on the importance of the changes which occur when a substance burns, and in doing this he prepared the way for Stahl and the phlogistic chemists.
In the seventeenth century, Beccher and Stahl, two German chemists, brought forward what is known as the phlogistic hypothesis.
The caloric theory, like the crude notions of the old Greek philosophers about fire, and like the phlogistic hypothesis, has been rejected because it failed to explain the phenomena of heat.
An excess of nutrition produces a phlogistic process analogous to that of the soft parts; a defect of nutrition makes the teeth thin, arid, and weak.
Besides, he says, we cannot be surprised that the teeth may be subject to a phlogistic process, when we consider that these, like the soft parts, assimilate nourishment.
Against dental pains of phlogistic origin, he recommends bloodletting, purgatives, and many local medicaments, reproduced in great part from Rhazes.
His treatment, therefore, is merely directed to the curing, in so far as is possible, the phlogistic symptoms, by scarifications of the gum and by the use of astringent remedies.
This marly mountain itself, which had been formed of loose materials gathered together at the bottom of the sea, was first to be filled with pyrites, in various shapes, by means of the phlogistic and the acid of the mountain.
All animals and vegetable bodies contain both those different chemical substances united; and this phlogistic composition is an essential part in every animal and vegetable substance.
The production of coal from vegetable bodies, in which that phlogistic substance is originally produced, or from animal bodies which have it from that source, is made by heat, and by no other means, so far as we know.
This restoration of vitiated air, I conjecture, is effected by plants imbibing thephlogistic matter with which it is overloaded by the burning of inflammable bodies.
I imagine that the effect was produced by those substances, or by the water which they attracted from the air, imbibing the phlogistic matter discharged from the lungs.
When it extinguishes flame, it is probably so much charged with the phlogistic matter, as to take no more from a burning candle, which must, therefore, necessarily go out in it.
May not this phlogistic matter be even the most essential part of the food and support of both vegetable and animal bodies?
Priestley, and other advocates of the phlogistic theory, was to disprove the fact that water is a compound of oxygen and hydrogen.
The old chemical phraseology as far as it had any meaning was entirely conformable to the phlogistic theory.
Kirwan's view of the subject was that which had been taken by Bergman and Scheele, and indeed by every chemist of eminence who still adhered to the phlogistic system.
It was during the repeated conferences held with Lavoisier and the other two associates that Morveau became satisfied of the truth of Lavoisier's new doctrine, and that he was induced to abandon the phlogistic theory.
One of the most eminent of those who still adhered to the phlogistictheory was M.
He examines the phlogistic theory of Stahl at great length, and refutes it.
Nobody chose to give up the phlogistic theory to which he had been so long accustomed.
Blood absorbs oxygene from the air, whence phosphoric acid changes its colour, gives out heat, and some phlogistic material, and acquires an ethereal spirit, which is dissipated in fibrous motion.
Sir Humphry Davy has observed, that "at the time when the anti-phlogistic theory was established, electricity had little or no relation to chemistry.
The most important modification of the phlogistic theory--for there were several others--may be said to be that suggested by Dr.
These views, regarding the phenomena of combustion and acidification, may be considered as constituting what has been termed the Anti-phlogistic system.
It materially assisted the diffusion of the anti-phlogistic doctrine, and even facilitated the general acquisition of the science; and many of its details were contrived with much address, and were worthy of its celebrated authors.
It will be scarcely possible for a future generation of philosophers to imagine with what an undisciplined ardour the anti-phlogistic system, thus enhanced by a new and fascinating nomenclature, was supported throughout Europe.
The abandonment of the phlogistic theory is an illustration of the readiness with which scientific hypotheses are surrendered, when found to be wanting in accordance with facts.
But, on weighing a portion of any metal, and also the oxide producible from it, the latter proves to be the heavier, and here the phlogistic hypothesis fails.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "phlogistic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
