MULTIJUGATE TYPES. 185 



Other systems may be similarly constructed, and the essential 

 point of the mathematical proposition rendered clear, that in 

 midtijugate systems there is no longer a single genetic spiral. 



Such systems may now be viewed from the standpoint of a 

 transition to symmetrical construction, ia that while the Fibonacci 



3/ 



Fig. 70. —Geometrical construction for bijugate system (10 + 16). 



ratios are to a certain extent retained, the construction is modified, 

 with the result that two members are simultaneously produced, and 

 the system, to continue a previous metaphor, is now built two 

 hricks at a time, the members of each series being formed at the 

 proper divergence angle. While again there is no nearer approach 



