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...culi]'' (1647) Books I & II, translated and annotated by Ian Bruce, quoted from [http://www.17centurymaths.com/contents/gregorius/book1a%20pp1-20.pdf Book ...ork was not such as to make easy reading. ...Amongst those who gained much from the ''Opus geometricum''... [was] [[Blaise Pascal]] whose ''[https://books. ...

...a matter of common usage to call the barbarous age that time which extends from about 900 or a thousand years up to about 150 years past, since men were fo ...f so great advantage. ...they may all deliver them selves when they will, from so much and so great labour. ...