84 



PROSERPINA. 



It expands from C to a b; and closes in the 

 external line, and for this reason. 



Considering every flower under the type of a cup, 

 the first part of the petal is that in which it expands 

 from the bottom to the rim ; the second part, that 

 in which it terminates itself on reaching the rim. 

 Thus let the three circles, ABC, Fig. 6, represent 

 ABC 



a b c 



Fig. 6. 



the undivided cups of the three great geometrical 

 orders of flowers — trefoil, quatrefoil, and cinquefoil. 

 Draw in the first an equilateral triangle, in the 

 second a square, in the third a pentagon ; draw the 

 dark lines from centres to angles ; (D E F) : then (a) 

 the third part of D ; (b) the fourth part of E, (c) 

 the fifth part of F, are the normal outline forms 

 of the petals of the three families ; the relations 



