The Mathematical Gazette: Volume 4 -

The Conic through Five Given Points
A. C. Dixon
Published online by Cambridge University Press:

03 November 2016, pp. 228-230
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The following discussion may be of interest on account of the way in which it leads to the axial and focal properties.
I. Let the locus of a point P such that A(CDEP) = B(CDEP), where A, B, C, D, E are fixed points, be called the conic (AB, CDE). Then it is clear that permuting A, B or C, D, E does not affect the conic, and that the conic passes through C, D, E, and also through A, B. (Give BP the four positions BC, BD, BE, BA and then give AP the position AB.)

Principes et Formules de Trigonométrie Rectiligne et Sphérique Par J. Pionchon. (Gauthier Villars.) 5 francs.
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03 November 2016, pp. 268-269
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Cartesian Plane Geometry, Part I. Analytical Conics. By Charlotte Angas Scott, D.Sc. (Dent & Co.)
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03 November 2016, pp. 163-164
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Briefwechsel zwischen C. G. J. Jacobi und M. H. Jacobi. Herausgegeben von W. Ahrens.
Published online by Cambridge University Press:

03 November 2016, pp. 269-270
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The Mathematical Gazette