m t 





wherein, however, a and 6 are no longer intercept* aa in 

 l,wd(4> 



> [82] bM iu conihmt Unn sar- 

 may be written in t t\|.i.ul 



CO 





Theea seven equations are ttandard form* of the equation 

 of second degree, and will be diaouned in turn. 



The ellipsoid: equation * 



- * ^ roin the 



[84] 



the following properticM of i 

 (1) The traces on each coo 



IfeUI 



