276 



UNIVERSITY OF COLORADO STUDIES 



3 



Fig. 1 



A, as the y-axis; furthermore AjA^^AjA^^ A3A^=:1, it can easily be 

 verified that to a point (*',y) corresponds in the Steinerian transfor- 

 mation a point (a?', y') so that 



and conversely 





y 



Ax' 



y 



4(«'''+2/")— 1 



