ORDEB IV. HEMI-PBISMATIC HABRONEME-MAL. 175 



require perhaps some correction from admeasurements of 

 better pronounced crystals. Those to which the above 

 description refers, are preserved in the Wernerian collec- 

 tion at Freiberg. Messrs LEVY, PHILLIPS, and BROOKE, 

 have also observed the hemiprismatic character of com- 

 binations. Mr BROOKE gives the angle of the prism 

 (Pr + co) 3 = 37 30', but likewise from imperfect crystals. 



2. Two analyses of the variety from the Rhine have 

 yielded, 



Oxide of Copper 68-13 62-847. 



Phosphoric Acid 30-95 21-687- 



Water 0-00 KLAPROTH. 15-454. LUNK. Ed. 



Ph. Journ. VoL V. p. 213. 



Before the blowpipe it melts and boils easily, and is con- 

 verted into a small vesicular metalloidal globule. It is 

 soluble without effervescence in nitric acid, particularly if 

 heated. 



3. The prismatic Habroneme-makchite is found in veins 

 traversing greywacke slate, and is accompanied by several 

 varieties of rhombohedral Quartz, and ores of copper, as 

 in the Virneberg near Rheinbreitbach on the Rhine. 



2. HEMI-PEISMATIC HABRONEME-MALACHITE. 



Malachite. JAM. Syst. Vol. II. p. 321. Di-prismatic 

 Green Malachite or Common Malachite. Man. p. 102. 

 Green Carbonate of Copper. PHILL. p. 310. Mala- 

 chit. WERK. Hoffm. H. B. III. 2. S. 144. Malachit. 

 HAUSM. III. S. 1025. Kohlensaures Kupfer (in part). 

 L.EONH. S. 276. Cuivre carbonate' vert. HAUY. Traite\ 

 T. III. p. 571. Tabl. comp. p. 90. Cuivre carbonate' 

 (in part). Traite', 2de Ed. T. III. p. 488. 



Fundamental form. Scalene four-sided pyramid. 

 P = 139 IT, 127 25', 68 33'. Inclination of 

 the axis in the plane of the short diagonal = 0. 

 Vol. I. Fig. 41. AP. 



a : b : c : d = I : 5-64 : / 3-48 : 



