130 Trans. Acad. Sci. of St. Louis. 



Essonite^ at Iron Mt., St. Francois County, as yellow, sub- 

 transparent, rhombic-dodecabedral crystals 1 mm. in 

 size on specular hematite, by W. B. Potter ; rare. 



Zircon "] 



\J JiTij soIHg I 



jy. . 'in microscopic sections of the granites in 



,.. ,. I Southwestern Mo., by E. Haworth. 



Piedmontite j 



A.7l01'tJliiQ ~^ 



A -, .. (ill microscopic sections of the porphyries in 



r, ^ .' 1 Southwestern Mo., by E. Haworth. 

 Bytowmte ) 



Topaz ) at the Einstein Mine, Madison County, in the 



Lepidolite j granite, by E. Haworth. 



Talc^ at Pilot Knob, Iron County, as thin, white scales on 



specular hematite ; not common. 

 Margarodite, at the Einstein Mine, Madison County, as 



imperfectly radiating scales of a light gray color and 



pearly lustre, from 4 to 8mm. long, by H. A. Wheeler; 



not common. 

 Kaolinite. Kaolin variety. Very abundant in pockets as 



soft, white to pink, slightly plastic clay in Bollinger, 



Cape Girardeau and Howell counties. Is extensively 



mined. 

 China or Ball Clay Variety. Occurs as pockets, of light 



gray color, and very plastic, in Jefferson and Franklin 



counties; is extensively mined. 

 Lithomarge Variety. Very abundant in pockets as a hard, 



non-plastic, light gray to buff color, with conchoida 



fracture, in Warren, Callaway, Osage, Phelps, Crawford 



and Franklin counties. Is extensively mined and shipped 



as " flint fireclay." 

 Pholerite, occurs with the Lithomarge, as above, by 



H. A. Wheeler. 

 Pyrophyllite i at Potosi, W^ashington County, as very thin, 



white, greasy feeling scales, intermixed with clay, from 



the lead mines, by Dr. G. Hambach ; rare. 



CARBON MINERALS. 



Peat, at Glenwood, Schuyler County, in local swamps, in the 

 drift, by H. A. Wheeler; not abundant. 



