"Van Helmont recognised the acid of the gastric juice and the alkali of , but Sylvius appreciated the importance of the salivary secretion and the . Many of the digestive processes were, he maintained, due to the swallowed with the food, rather than to the ferment secreted by the stomach and other organs. Saliva caused the first stage of fermentation, but the second was due to the bile and the pancreatic juice. He identified physiological fermentation with chemical effervescence. He discarded such agencies as the demon Archaeus of Paracelsus, and contended that although he could not explain the various processes, physiological operations were due to chemical principles, and that air inhaled in respiration acted upon and altered the blood. Illness was due to abnormal chemical reactions in the body, and could therefore be counteracted by other reactions. These theories, connecting as they did chemistry with medicine, had a great influence on the development of the former science."
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A History of Chemistry from the Earliest Times
A History of Chemistry from the Earliest Times (1920) was originally published as A History of Chemistry from the Earliest Times till the Present Day (1913). It is a work by chemist and professor , who taught at the Liverpool Royal Infirmary School of Medicine, . He is best known for this history of chemistry. The work was completed, post-mortem, from the notes used by Professor Brown to deliver his lectures on the History of Chemistry. Those notes were consolidated and edited by Henry H. Brown,
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