122 Mr HAIDINGER'S Mineralogical Account of 



I. PRISMATOIDAL MANGANESE-ORE. 

 Manganite. 



Grau-Braunstein, in part, Hausmann, p. 288. 



Grey Manganese-ore, in part, Jameson, vol. iii. p. 252. 



Grey Oxide of Manganese, in part, Phillips, p. 243. 



Prismatoidisches Manganerz, Mohs, vol. ii. p. 488. 



Prismatoidal Manganese-ore, Mohs, Translation, vol. ii. p. 419. Id. Haidm- 



ger, Edin. Journ. of Science, vol. iv. p. 41. 

 Gewaessertes Mangan-Hyperoxidul, Leonhard, p. 239. 



Fundamental Form. Scalene four-sided pyramid. P = 130 

 49', 120 54', 80 22'. Plate, Fig. 1. 



a:b:c: = 1 :/ 3.37 : v/ 2.4. 

 Simple forms. 1. P oo (o). 



2. P (P) = 130 49', 120 54', 80 22'. 



3. P + 1 (m) =112 35', 97 35', 118 45'. 



4. P+oo (M) = 99 40'. 



5. (f Pr) 3 (c) = 117 16', 144 5', 74 28'. 



6. (Pr) 3 (n) = 95 4', 132 50', 103 24'. 



7. (Pr + oo) 3 (/) = 61 18'. 



8. (Pr I) 3 (h) = 154 13', 116 10', 70 2'. 



9. (Pr + oo) 3 (r) = 134 14'. 



10. (| P _ 2) ' (g) = 162 39', 115 10', 67 42'. 



11. (Pr + oo) 5 (s) = 76 37'. 

 18. fir (d) =114 19'. 

 lS."pr(e) =122 50'. 



Character of combinations hemi-prismatic, with incHned faces. 

 Combinations. 1. P oo . P + oo. Fig. 2. 



2. P x. P + oo. CPr + oo) 5 . Fig. 3. 



3. Pr. P+oo. (Pr+oo) 5 . Fig. 4. 



