20 6 Iron. »»nen uie bevelling planes , , & ui me octahedron bcf- , G # arge ’ the fi 8 ure P asses into the icosahe dron *, fig. 192. 10. Cube, in which each angle is acuminated with three Planes which are set on the lateral edges f, cm i etlmes the acuminating planes be ne so arge, that the original faces of the cube appear as small rhombs fig. 194 . Diane" " hm ^ ' S acuminat ed with three time 11 S6t ° n the kteral P Ian - = Tsu ™ mmati *g P la "<* become so large, that the original faces of the cube entirely disap pear, when there is formed '2. «««»», or eery acute double ofS, ‘ |,),ramid ’ in Wl " dl U “ P'«"« of t e one „e !et 0 „ ^ ^ ^ ^ are acuminated „i,h f„ ur p ,a„ es , winch are set on the alternate lateral ed.es II. •nd smo11 ' The icos " ,iejr “ i ^^Z;:;^;zr eh part:mi ^ ,he ™ ie ' The surface of the rmtni. • times alternated , 18 some t™es smooth, some. ocular-splendent t^lil4L n g. theIUStre lustre is^netafiic; ^ ^ gIistenin S’ aild the The * Fer sulphure icosaedrc, Ilauy t Fer sulphure quadriepointe, H ally . $ Fer sulphure triacontaedre, H auy . D Fer sulphure trapezoidal, Ilauy.