APPLICATION OF VORTEX CONSTRUCTION. 



55 



In such a numbered diagram, the parastichies (34 + 55) are 

 observed to be by construction a concentrated system comple- 

 mentary to two other curves, the members of which differ by 89 

 and 21 respectively. 



rfTrfe9>' ■ 





^ig. 25. Log. spiral eonstruotion for capitulara of Seliaiithus, (34 + 55) 



capitulum taken as a type : genetic spiral winds right. 



That the orthogonal system adopted by the plant is the one 

 which makes most nearly for optimum concentration is shown by 

 the comparison of other orthogonal systems which would pass 

 through the same points of intersection. These systems may be 

 deduced from the functions of the summation series of numbers, or 

 taken from the diagram. 



