Insert text about quadrics...

Quadrics

 Name version   modified
 Confocal-Quadrics [dir]   00-06-09
 ellipsoid1.html -    00-06-09 notes 
 ellipsoid1.html.html -    00-06-09
 ellipsoid1_tang1.html -    00-06-09
 ellipsoid_hyperboloid.html -    00-06-09
 line-hyperboloid.mov n/a   00-06-09
 one_sheeted_hyp_tang1.html -    00-06-09
 one_sheeted_hyperboloid1.html -    00-06-09
 two_sheeted_hyp_tang1.html -    00-06-09
 two_sheeted_hyperboloid1.html -    00-06-09

 

Constructed by Ambjörn Naeve and Olle Sundblad