A History of Chemistry. 1. Theoretical Background by J. R. Partington PDF

By J. R. Partington

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T h e indestructibility of matter is clearly stated by Melissos o f Samos (fl. ' Since he believed that ^Deussen, (i), II, i, 82; Diels, (5), 100; Gilbert, 102. * Burnet, (i), 186, 192, 215; Diels, (5), 42,44, 114; Zeller, (i). I, ii*, 990. * Bumet, (i), 177. •*Physics, i, s, i88a; Burnet, (i), 185, 223; Gilbert, lo i. * Bumet, (i), 192; Diogenes Laertios, ix, tr. Yonge, 1891, 384, gives both cold and earth as the second principle; Tertullian, De Anima, 43; Waszink, 58, 462, says Parmenides and Empedokles taught that sleep serves to cool the body.

Whittaker, (i), 10; Zeller, (i). I, ii*, 1220,1228. 25 T€ TrdvTOiv x/3i7fiaTaiv)’ . ^ Anaxagoras assumed that at first the most heterogeneous substances were everywhere commingled. ) worked upon it by a very rapid vortex motion (Treptx^/jctv), beginning in a point and spreading from this. * W ater was separated from air, earth from water, and from earth stones (e/c Trj? yrj^ \L6oC), by the action o f cold {ifwxpov). ® T h e ‘elements’ separated were not pure and unmixed. T h e vov? * Plato* said that ‘Anaxagoras made no use of reason and did not give the true causes for the regular arrangement of individuals, but proposed air, ether, water, and other unsuitable things as causes’; he introduced vou?

T h e soul is located in the brain, sensation passing to it through canals, and it is in eternal motion, like the stars. ® Wellmann^® supposed that the Sicilian School taught that the soul or vital pneuma {ifwxtxov TrveOfia; hvvafiig iJtvxtKrj) is in the heart, whilst the School of K os located it in the brain. It circulates in the veins and arteries, said to have been distinguished by Euryphon. It is not certain that Alkmeon was a Pythagorean. He did valuable research on the nature of sense-perception (used by Empedokles and Demokritos), generalised on the nature of health, and speculated on natural phenomena.

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A History of Chemistry. 1. Theoretical Background by J. R. Partington


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