Discourse on the Method, part 5, ¶ 8-2

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René Descartes

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https://github.com/davepinch/pinchy.cc/blob/master/content/topics/works/r/rene-descartes/discourse-on-the-method/translation/part-5/5-8-2.md

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Brendan Carr (lawyer) (Wikipedia) Brendan Thomas Carr (born January 5, 1979) is an American lawyer who has served as a member of the Federal Communications Commission (FCC) since 2017. Appointed to the position by Donald Trump, Carr previously served as the agency’s general counsel and as an aide to FCC commissioner Ajit Pai. In private practice, Carr formerly worked as a telecommunications attorney at Wiley Rein.

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Discourse on the Method (Veitch translation)

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And why should the left cavity of the heart and the great artery be wider and larger than the right cavity and the arterial vein, were it not that the blood of the venous artery, having only been in the lungs after it has passed through the heart, is thinner, and rarefies more readily, and in a higher degree, than the blood which proceeds immediately from the hollow vein?

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But there are many other circumstances which evince that what I have alleged is the true cause of the motion of the blood: thus, in the first place, the difference that is observed between the blood which flows from the veins, and that from the arteries, can only arise from this, that being rarefied; and, as it were, distilled by passing through the heart, it is thinner, and more vivid, and warmer immediately after leaving the heart, in other words, when in the arteries, than it was a short time before passing into either, in other words, when it was in the veins; and if attention be given, it will be found that this difference is very marked only in the neighbourhood of the heart; and is not so evident in parts more remote from it.