FIG. 280. 



FIG. 281. 



PLI'CATE. 

 Folded like a 

 fan (Figs. 280 

 and 281). 



CONVOLUTE. 



With the 

 leaf rolled 

 spirally s o 

 that one edge 

 is in the cen- 

 tre of the coil 

 and one out- 

 side (Fig. 

 282). 



