Miner alogia,- : - 367 



Ochra. 



Jean Etiinne Guettard, 

 Memoire far l'ocre. 



Mem. de l'Acad. des Sc. de Paris. A. 1762. Hifl. p. 30, 

 Mem. p. 53. 



. . . LE MONNIER, i 



Obfervation fur une mine d'ocre dans le Berry. 



Ibid. A. 1744. Hift. p. 47. Ed. Oct. A. 1744. Hift. p. 62, 

 Balthazar George Sage, 



Analyfe de la terre bolaire jaune du Berry, 



Ibid. A. 1779. Hift. p. 10. Mem. p. 310. 



"Philippe Freder. de Dietrich, 

 Memoire fur les ocres. 



Ibid. A. 1757. Mem. p. 82. 

 Ueber die Okern von Berry in Franlueich. 

 Bergbaukunde. B. 1. S. 102. 



SchiftuS. 



Samuel Tlieophilus Lange, t 



Meditationes de fchifto, ejus indole atque geneli cum 

 defcriptione duorum vegetabilium rariorum fioris et 

 ariftae in fchifto repertorum. 

 Acta Acad. Nat. Curiof. Vol. 6. Append, p. 133. 

 Samuel Coeepress, 



Some cbnfiderations touching the variety of slate, to- 

 gether with a computation of the charges in general 

 for covering the houfes therewith. 

 Philof. Transact, Y. 1669. p. 1009. 



Extract of the minutes of the Philofophical Society at 

 Oxford , concerning Irish slat, 

 Ibid. Y. 1698. p. 271. 

 Jean Etienne Guettard, 



Memoire fur les ardoifieres A'diigers. 



Mem. de l'Acad. des Sc. de Pari?, A. 1757. Hift. p. 17. 

 Mem. p. 52. Ed. Oct. A. 1757. Hilt. p. 25, Mem. p. 76, 



, . ; Tuc- 



