G-enth.] OJU [Sep. 19, 



Besides the jeffersite there appear to be other products of the altera- 

 tion of chlorite, at the Culsagee Mine, Nos. 22 and 23, which appear to 

 be new. 



22. Kerrite (a new mineral). 



It consists of innumerable fine scales, which under the microscope do 

 not present a definite shape. They are very soft. Sp. Gr. = 2.303, Cha- 

 tard. Their color is pale greenish-yellow with tint of brown ; their lus- 

 tre is pearly. 



When heated they exfoliate, but not as much as jeffersite ; B. B. melts 

 to a white enamel. Chlorhydric acid decomposes it easily with separa- 

 tion of silicic acid in pearly scales. No corundum has been found in the 

 scaly aggregates, but sometimes plates of green chlorite are intermixed 

 with it. It is named in honor of Prof. W. C. Kerr, State Geologist of 

 North Carolina. 



It was analyzed by Mr. Thos. M. Chatard with material, which was 

 examined under the microscope and apparently perfectly pure. He found : 



99.78 99.97 



Tim average of the two analyses gave the ratio of oxygen of RO : 

 RA : Si0 2 : H,0 = 5.4 : 3 : 10.3 : 9.5, which is nearly =6:3 

 : 10 : 10, represented by the formula : 



2(3RO,2Si0 2 ) + (R^-SiOj) + 10 H.O. 



23. Maconite (a new species). 



This is another scaly mineral, and closely resembles a fine scaly jeffer- 

 isite. The scales are slightly harder than the last, and under the micro- 

 scope they are also irregular. Sp. Gr. = 2.827, Chatard. They are 

 dark brown, their lustre pearly inclining to submetallic. When heated, 

 exfoliates largely and fuses with difficulty to a brown glass. Easily 

 decomposed by chlorhydric acid with separation of silicic acid in pearly 

 scales. 



Contains numerous fragments of dark blueish-gray corundum, and 

 microscopic apparently triclinic brilliant reddish-brown crystals which 

 may be sphene. Name from Macon County, North Carolina. 



Two analyses of apparently perfectly pure material were made by Mr. 



