Van Helmont (1577-1644) was the last distinguished investigator who professed actually to have changed mercury into gold, though impostors and mystics of various kinds continued to claim knowledge of the art long after his time.
1610), chefly famous for his Opera Omnia Medicochymica (1595); Jean Baptiste van Helmont (1577-1644), celebrated for his researches on gases; F.
At all times the air had received attention, especially since van Helmont made his far-reaching investigations on gases.
The 18th century witnessed striking developments in pneumatic chemistry, or the chemistry of gases, which had been begun by van Helmont, Mayow, Hales and Boyle.
Nitric oxide, NO, first obtained by Van Helmont, is usually prepared by the action of dilute nitric acid (sp. gr.
The dominant factors in the r 7th-century medicine were the discovery of the circulation by William Harvey (published in 1628), the mechanical philosophy of Descartes and the contemporary progress of physics, the teaching of Van Helmont and the introduction of chemical explanations of morbid processes, and finally, combined of all these, and inspiring them, the rise of the spirit of inquiry and innovation, which may be called the scientific movement.
Van Helmont (1578-1644) was a man of noble family in Brussels, who, after mastering all other branches of learning as then understood, devoted himself with enthusiasm to medicine and chemistry.
It is enough to say that on this fantastic basis Helmont constructed a medical system which had some practical merits, that his therapeutical methods were mild and in many respects happy, and that he did service by applying newer chemical methods to the preparation of drugs.
In some theoretical views, and in the use of certain remedies, the school owed something to Van Helmont and Paracelsus, but took in the main an independent position.
Carbon dioxide, C02, is a gas first distinguished from air by van Helmont (1577-1644), who observed that it was formed in fermentation processes and during combustion, and gave to it the name gas sylvestre.
Dr George Thomson, a chemist and a disciple of Van Helmont, followed the example, and nearly lost his life by an attack which immediately followed.4 The plague of 1665 was widely spread over England, and was 4 On the plague of 1665 see Nath.
Benedictus, De observatione in pestilentia, 4to (Venice, 1 493); Nicolaus Massa, De febre pestilentia, 4to (Venice, 1556, &c.); Fioravanti, Regimento della peste, 8vo, Venice, 1556; John Woodall, The Surgeon's Mate, folio (London, 1639); Van Helmont, Tumulus pestis, 8vo (Cologne, 1644, &c.); Muratori, Trattato del governo della peste, Modena, 1714; John Howard, An Account of Lazarettoes in Europe, &c., 4to (London, 1789); Patrick Russell, A Treatise of the Plague, 4to (London, 1791); Thomas Hancock, Researches into the Laws of Pestilence, 8vo (London, 1821); Fodere, Lecons sur les epide'mies, &c., 4 vols.
It was obtained in 1644 by Van Helmont, who heated copper with sulphur and moistened the residue, and in 1648 by Glauber, who dissolved copper in strong sulphuric acid.
Helmont, Berichte, 18 94, 2 7, p. 2352; P. Jacobson, Berichte, 1892, 2 5, p. 994).