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Published online by Cambridge University Press: 24 October 2008
There are in the Fifth Book of Euclid's Elements twelve propositions, the object of which is to prove the equality of two ratios.
* The first paper of this set is in the Transactions, Vol. XVI, the second in Vol. XIX, the third, fourth and fifth in Vol. XXII. There is an addendum to the fifth paper in Vol. XXI of the Proceedings.Google Scholar
† This proposition was known to De Morgan, see my fourth paper, p. 185.Google Scholar