'9 i Silica Genus. V IV. Clay Genus Kinds. Species. cS Jit "3 ■ o 81 Mejonite. 82 Nepheline. 83 Ice-spar. 84 Chiastolithe. 85 Scapolithe. 86 Socialite. 87 Wernerite _88 Spodumcne. d. Adular. e. Aventurin. a. Common. b. Glassy. c. Red. a. Fibrous. b. Lamellar. a O U. o -i '89 Pure clay. 90 Porcellain clay. 91 Common clay. 92 93 94 95 96 Clay-stone. Adhesive-slate. Polishing-slatc. Tripoli. Nectilithe. a. Potters’ clay. A Variegated clay c. Slate clay. o ■«-» 63 cn s* □ o S <3 '97 Alum-stone. 98 Alum-slate. 99 Bituminous-slate. 100 Dravcing-slate. 101 Whct-slate. 102 Clay-slate. a. Common. b. Glossy. o a '103 Mica. 104 Pot-stone. 105 Lcpidolithe. 106 Petal ite. 107 Finite. 108 Chlorite. a. Earthy Chlo rite. b. Common- Chlorite.