APPLICATION OP VORTEX CONSTRUCTION. 



53 



curves (1), and half the long curves (2), an asymmetrical network 

 of similar « squares " will be obtained. To produce these results 

 the number of points into which the original circle was divided 

 must be divisible by two. 



Fig. 24.- 



-Geometrical constraotion of log. spiral curves : 

 ratios (1 : 1), (1 : 2), and (5 : 8). 



In the same way a pair of cui-ves in the ratio of 34 : 55 may be 

 obtained by dividing the circle into a number of parts, of which 

 34 and 55 are factors, and drawing two continuous curves across 

 the meshes in the ratio 34 : 55 on one side, and 55 : 34 on the 

 other. As these numbers are unwieldy, a simple method will 



