140 



ATTRACTIONS . 



each layer being made less than that immediately preceding it, by 

 one row of particles on each of its edges, a dodecahedron, or twelve 

 sided solid, with rhombic faces, will be produced." 



FIG. 12. 



"If, instead of diminishing every layer one row, on every edge, they 

 be made less, at each addition, by two rows on two parallel edges, 

 while, upon the other two edges, each layer is made alternately the same 

 as the preceding, alternately less by one row, a dodecahedron, or 

 twelve sided solid, with pentagonal or five sided faces, will be pro- 

 duced." 



FIG. 13. 



