Harriot, Thomas, Mss. 6784

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3317
[Commentary:
The references on this page are to Commandino's edition of Mathematicae collectiones (Pappus , pages 171 and 172 (Propositions 17 to 21). Proposition 17, for example, is as follows.
Sint duæ rectæ lineæ AB BC, & inter AB BC media proportionalis fit BD, ipsique AD æqualis ponatur DE. Dico rectam lineam CE excessum, quo utreque AB BC excedunt eam, quem potest id, quod quater AB BC continetur.
Let there be two straight lines AB and BC, and the mean proportional between AB and BC is BD, and DE is made equal to AD. I say that the line CE is the excess by which AB and BC together exceed the line euqal in square to four times the product of AB and BC. ]
Pappus 171. ad resectione
Pappus.
Utile ad
epilogum 13,
[Translation: Useful for the position of epilogue ]

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