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Published online by Cambridge University Press: 03 November 2016
Pursuing the comparison with the ordinary methods of Geometry, we may now say that we have established the foundations of Projective Geometry, and have now to make the transition from projective to metrical methods; the distinction between which, though commonly assumed, has never, so far as I am aware, been clearly expressed. The corresponding distinction in the theory of Order is that between unique collation in general, and what I shall now proceed to define as transformation.