7210 



Properties of Conies 



Normals 7210 



Imaginary points on conies. Schou, (Lt.) T. V. 

 (xn) Ts. Mth. 1 (1865) 93-. 



projection. Retail, V. Bologna Ac. Sc. 

 Mm. 7 (1886) 601-. 



In- and circum-conics. Steiner, J. G. Arcad. 



99 (1844) 147-. 

 (Steiner's theorems, proofs) . Mathews, 



G. B. [1890] L. Mth. S. P. 22 (1891) 18-. 

 and conjugate conies. Schroeter, E. 



G. Mt. 22 (1884) 262-. 

 In -conies of conies, construction. Niemtschik, 



R. Wien Sb. 67 (1873) (Ab. 2) 295-, 505- ; 



71 (1875) (Ab. 2) 435-. 

 Indicatrix in conic sections. Haas, A. Z. 



Mth. Ps. 34 (1889) 65-. 

 Intersection of conies and circles, construction. 



Niemtschik, R. Wien Sb. 59 (1869) (Ab. 2) 



39-. 



, construction. Lazarski, M. (xii) 

 Krk. Ak. (Mt.-Prz.) Ez. & Sp. 8 (1881) 141-. 



ellipse with circle and rectangular hyper- 

 bola. Vries, J. de. N. Arch. Wisk. 3 (1898) 



160- ; Fschr. Mth. (1898) 528-. 

 straight line with conies, construction. 



Koutny, E. Wien Sb. 56 (1867) (Ab. 2) 303- . 

 lines with conies, construction. 



Peschka, G. A. von. Arch. Mth. Ps. 59 



(1876) 18-. 

 , . Pelz, C. Arch. Mth. 



Ps. 66 (1881) 1-. 

 , and integral formula. Cayley, 



A. [1862] (VH) QJ. Mth. 7 (1866) 1-. 

 Intersections of central conic with the 4 normals 



from any point in its plane. Bruno, G. 



Tor. Ac. Sc. At. 11 (1876) 597-. 

 conic with 6 other conies. Lachlan, R. 



Mess. Mth. 15 (1886) 155-. 

 Involution of several points on a conic. Weill, 



M. N. A. Mth. 1 (1882) 62-. 

 Involutions on conies, construction of algebraic 



expressions by help of. Kotdnyi, L. Z. 



Mth. Ps. 27 (1882) 248-. 

 , Desargues's theorem. Poudra, N. G. 



N. A. Mth. 3 (1864) 202-. 

 , . Picquet, H. N. A. Mth. 



5 (1886) 163-. 

 , , demonstration. Wetter, A. 



Z. Mth. Ps. 24 (1879) 248-. 

 Isotomic figures, inscription. Gruson, J. P. 



Berl. Ab. (1824) 83-. 

 Latus rectum, or sections of given eccentricity, 



cutting from cone. Engler, E. A. St Louis 



Ac. T. 6 (1895) 183-. 

 Limiting cases of conies. Tlwmson, F. D. 



Mess. Mth. 4 (1868) 86-. 

 . Salmon, G. Mess. Mth. 4 (1868) 



129-. 

 . Taylor, C. Mess. Mth. 4 (1868) 



140-. 

 . Whitworth, W. A. Mess. Mth. 



4 (1868) 148-. 

 Loci and envelopes of 1st and 2nd degree, in 



projective geometry. Ovidio, E. d\ Nap. 



Rd. 14 (1875) 103-. 



of poles of certain chords. Desboves, A. H. 

 N. A. Mth. 19 (1860) 253-. 



one conic with respect to another. 



Hermite, C. N. A. Mth. 1 (1842) 263-. 



Loci of poles of variable circle etc. , hyperbolas 

 and parabolas as. Olivier, T. Quetelet 

 Cor. Mth. 5 (1829) 51-. 



Locus. Lhuilier, S. Gergonne A. Mth. 2 

 (1811-12) 173-. 



of centres of in-circles of triangles on line 

 joining foci. Ferroni, P. Mod. Mm. S. It. 

 19 (1821) 377-. 



from 2 conies. Cayley, A. QJ. Mth. 8 

 (1867) 77-. 



of an eye which sees, (1) an ellipse (2) a 

 hyperbola reflected in a perpendicular plane 

 as a circle ; problems of Steiner. Lazamki, 

 M. Krk. Ak. (Mt.-Prz.) Ez. 18 (1888) 76- ; 

 Fschr. Mth. (1888) 806-. 



points having constant chord of contact 



with reference to conic. Zahradnik, K. 

 Arch. Mth. Ps. 61 (1877) 220-. 



of vertex of angle with sides tangent to 2 

 conies. Caque, J. N. A. Mth. 1 (1862) 402-. 



triangle of constant perimeter 

 formed by 2 tangents and chord of contact. 

 P., L. N. A. Mth. 12 (1873) 401-. 



vertices of given ellipse and hyperbola, 



problem. Rispal, A. N. A. Mth. 2 (1843) 



357-. 

 Maxima and minima, certain. Duthie, G. 



Edinb. Mth. S. P. 12 (1894) 26-. 

 , problems. Lehmus, . Grunert 



Arch. 28 (1857) 249-. 

 Mean proportionals, two, Arabian construction 



for. Carra de Vaux, . Bb. Mth. (1898) 



3-. 



, , and other problems. Laab, C. 

 Arch. Mth. Ps. 11 (1892) 262-. 



Metrical properties. Dostor, G. Arch. Mth. 

 Ps. 61 (1877) 171-. 



theorems. Poncelet, J. V. Gergonne A. 

 Mth. 8 (1817-18) 1-. 



Middle points of chords common to conic and 

 its circle of curvature, locus. Zimmermann, J. 

 Arch. Mth. Ps. 70 (1884) 38-. 



through fixed point, locus. 

 Wunder, C. G. Grunert Arch. 5 (1844) 

 361-. 



, . [Am] Ende, H. 



Arch. Mth. Ps. 42 (1864) 98-. 

 , . Lommel, E. Arch. 



Mth. Ps. 43 (1865) 231-. 

 parallel chords, if collinear, curve is a 



conic, theorem. Bertrand, J. Liouv. J. 



Mth. 7 (1842) 215-. 

 Newton's influence on modern geometry. 



Graham, R. H. Nt. 42 (1890) 139-. 

 Non-Euclidean properties. Story, W. E. 



Am. J. Mth. 5 (1882) 358-; (xn) J. H. Un. 



Cir. [2] (1883) 71-. 



Normals. 



Gerono, G. C. N. A. Mth. 2 (1843) 16-, 72-, 



170-. 

 (Gerono.) Grunert, J. A. Grunert Arch. 6 



(1845) 127-. 



Pistoris, de. N. A. Mth. 7 (1848) 246-. 

 Catalan, E. C. N. A. Mth. 7 (1848) 332-, 



396-. 

 Cayley, A. Crelle J. 56 (1859) 182-. 



490 



