By D.E. Johnson, etc.
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Demise by means of Euphoria. Dysgenics. inhabitants loss of life Spiral. Genetic Superhumans. Geomagnetic Reversal. Galactic Collision. Strangelets. no matter if we adore it or no longer, everything's going to come back to a fine looking disagreeable halt on our planet sooner or later sooner or later. What we do not understand is what shape our extinction is probably going to take.
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Strictly speaking, the two scientists discovered nothing new: each of them only summarized the data of previous observations. But this summing up represented considerable progress in the history of human knowledge. Fixed air and inflammable air differed both from ordinary air and from each other. Inflammable air was surprisingly light. H. Cavendish found that phlogiston, which he had separated, had a mass. He was the first to introduce a quantity to characterize gases, that of density. Having assumed Ch.
In February 1774, the French scientist discovered that air which interacts with a substance during combustion is most suitable for respiration. Thus, A. Lavoisier met face to face with oxygen but refrained from announcing the discovery of a new gas since he was going to perform some additional experiments. In October 1774, Priestley reported to Lavoisier about his discovery revealing to the French chemist the real significance of his own findings. He immediately began to experiment with red mercury oxide which was the most suitable Ch.
Elements A. Discovered in Nature LAVOISIER Since these processes require a great amount of air, A. Lavoisier made another conclusion: air is a mixture of gases with different properties. A certain part of it supports combustion and becomes bonded to the burning substance. At first A. Lavoisier assumed that this type of air is similar to the fixed air of J. Black but soon he saw his error. In February 1774, the French scientist discovered that air which interacts with a substance during combustion is most suitable for respiration.
A Handbook of Active Filters by D.E. Johnson, etc.