166 THE ROYAL SOCIETY OF CANADA 



tors; and the principal parameters of the complexes have the same constant 

 numerical value. The integration of the Normal Equations of S involves 

 only direct operations and quadratures; and the finite equations of S in 

 Cartesian coordinates can he tvritten in the form 



x = 4(£/+F)-2(«-z;) {V -V), y=U' -V , z = u+v, 



where u = const., v = const, are the asymptotic curves. 



McGill University, 

 Montreal. 



