Abstract
THIS part of Prof. Loney's “Co-ordinate Geometry” contains, in order, chapters on cross-ratio geometry, trilinear and areal co-ordinates, tangential equations, reciprocation, projection, and invariants of conies. Methods of teaching geometry have advanced considerably in the last twenty years, and the arrangement adopted by Prof. Loney would scarcely be accepted as the natural one now. Trilinear and areal co-ordinates are here introduced from the purely metrical point of view. Now it would be more customary to read the chapters on projection and reciprocation first and then to treat trilinears and areals as particular cases of homogeneous co-ordinates.
The Elements of Co-ordinate Geometry.
By S. L. Loney. Part 2: Trilinear Co-ordinates, etc. Pp. viii + 228. (London: Macmillan and Co., Ltd., 1923.) 6s.
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The Elements of Co-ordinate Geometry. Nature 112, 932 (1923). https://doi.org/10.1038/112932d0
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DOI: https://doi.org/10.1038/112932d0