\ \ CONTE* l - 



. - r 



v* z* 

 229. The un-parted hyperboloid: equ a 1 . 



r t yt 



280. Th- l'i-iarte<l hyperboloid: equation ^5-^- *., = 1 . . 875 



x* v 1 



281. The paraboloids : equation -a ^ = z 



882. The cone: equation ^ + - k *0 ..... 378 

 288. The hyperboloid and its asymptotic cone .... 370 



APPENDIX 



orical sketch ........ 381 



I H. CuMotructifin of any conir ...... 382 



r. C. Special cases of the conies ...... 383 



NOTE D. Every section of a cone by a plane is a conic . 



NOTE E. Parabola as a limiting form of ellipse or hyperbola . 



N..M 1 < i focal conies ......... 388 



tanrm ............ wi 



IM.IX , 000 



