274 NICOLAUS STENO 



[Plate X] 



The six following figures explain two different kinds of angular 

 bodies of iron. 



Figures 14, 15, 16 serve to illustrate those angular bodies of iron 

 which are enclosed by twelve planes ; Figure 14, in fact, shows all the 

 twelve planes spread out into a single plane, six of these being tri- 

 angular and brilliant, the remaining six pentagonal and striated. 

 Figure 15 is the plane of the base of the same body. Figure 16 is 

 the plane of the axis of the same body. 



Figures 17, 18, and 19 serve to illustrate those angular bodies 

 of iron which are bounded by thirty planes. 



Figure 17 shows all the thirty planes spread out into a single 

 plane ; of these six planes are pentagonal and brilliant, twelve tri- 

 angular and also brilliant, six triangular and striated, six oblong 

 quadrilaterals and brilliant. 



Figure 18 is the plane of the base of the same body. 



Figure 19 is the plane of the axis of the same body. 



