PHYSIOGRAPHY. CLASS 11. 



Sparry Iron. Man. p. 61. Spathose Iron. Carbonate 

 of Iron. Brown Spar. PHILL. p. 236. Spatheisenstein. 

 WERN. Hoffm. H. B. III. 2. S. 262. Eisenkalk. 

 Sphtirosiderit. HAUSM. III. S. 951. 1070. Kohlen- 

 saures Eisen. L.EONH. S. 360. Chaux carbonatee 

 ferrifere. HAUY. Traite, T. II. p. 175. Fer oxide- 

 carbonate'. Tabl. comp. p. 99. Traite, 2de Ed. T. IV. 

 p. 113. 



Fundamental form. Rhombohedron. R = 107 0'. 

 Vol.I. Fig. 7. R.G. 



a = V 2-0093. 



Simple forms. R 00(0); R 1 (g) - 136 34', 

 R (P) Pfaffenberg, Hartz. R -f 1 (/) = 80 5', 

 Tavystock, Devonshire ; | R + 2 (s) 67 52', 

 Wheal Maudlin, Cornwall ; R + OD (c) ; 



P + QD (U). 



Char of Comb. Rhombohedral. 



Combinations. l.'R go. R. Sim. Fig. 111. 



Przibram, Bohemia. 

 %. R 1. R. Rathhausberg, Salzburg. 



3. R. R. + x. Sim. Fig. 114, the faces c very 

 small. Przibram. 



4. R. P + as. Sim. Fig. 118. Cornwall. 



5. R oo. R. J R + 2. Cornwall. 

 Cleavage. R, perfect. Seldom traces of R 1. 



Fracture imperfect conchoidal. 

 Surface. R QD generally rough ; R often round- 

 ed, which terminates in the saddle shaped lens. 

 Vol. I. Fig. 79, ; R 1 streaked parallel to the 

 edges of combination with R ; R + oo smooth, 

 P 4- oo rough, | R + 2 often uneven and 



