INDEX 



695 



I'l i.Mii. l.racliv . / /.<. 



diheuffonftl, >.'. 



ditetranoiial, ' 

 ditriKonal, 102. 

 macro. 116. 

 ni.-nl, 179. 

 ortho, IS S. 



tetragonal 



trigonal. 103. 



l.-t iirdiT tetragonal 



2d onirr hexagonal, 88. 



.'1.1 order, hexagonal, &$ 



2d order tetragonal, 68. 

 l'i i-iiiatic cleavage, 2M. 

 Prismatic hal.it, Mf. 

 Prochlorite, 678. 

 Projection, 31. 



axes, 35. 



clinographic, SI, S3. 



orthographic, 31. 



stereographic, J&. 

 Pn.leetite, 679. 

 Proaopite, 663, 679. 

 Proustite, 323. 598, 607, 645. 

 Pseudobrookite, 634. 

 Pseudomalachite, 644. 

 IV--i-ii.loiiii.ri.il, 361, 363. 

 P.-eiidosymmetry, 141 

 Psilomehme, 368, 596, 632. 

 Ptiolite. 479. 

 Pucherite, 651. 

 Pyciiotneter, 263. 

 Pyramid, 113. 



dihexagonal, 86. 



ditriRonal, 101. 



hrini-, 71. 



lii'xagonal, 86. 

 monoclinic, 122. 



tetragonal, 66. 



trigonal, 102. 



Pyrargyrite, SOT, 596, 607, 624, 645. 

 Pyritc, 313, 599, 609, 630. 



arsenical, S18. 



class, 313. 



copper, 310. 



group, 313. 



magnetic, 308. 



twins, 141. 

 Pyritohedron, 60. 

 Pyroaurite, 658. 

 Pyrochlore, 668. 

 Pyrochroite. 9tt, 632. 667. 

 I'yrocli'i-tric, 475. 

 Pyrolusite, W2, 596, 597, (WJ. 

 l'\ roinorpliitc, H5, Ml, 602, 606, 648. 

 Pyrope. 44.1. 677. 

 Pyrophane, 847. 

 Pyrophanite, 632. 

 Pyrophillito. 4OT, 678. 

 Pyrosmaltite, 659. 

 Pyrostilpnite, 645. 



... '.ni. MIX i.ir,, 677. 

 group, 4l, 4'o 

 iiioiioclinic, 423. 

 ortliorlioiiil.ic. 419 

 I'yrrhotitc. 3, 599, 609, 630. 



Quartz. 110, U*. 605, 611. 681. 



interference figure, 196. 



rotary polarization, 197. 



smoky, 359. 



wedge, 182, 184, 187, 196. 

 Quartzite, 3M. 

 Quenstedtite. 636. 

 Quicksilver, 293. 



R 



Radiated, 269. 

 Radicles, 224. 

 Radium, M4, 567. 

 Kaiimmdite, 637. 

 Ralstonitc, 679. 

 Uaiimielstargite, 316. 622. 

 Ranite, 479. 

 Raspite, 649. 

 Rational indices, /.''. 

 Ray, extraordinary, 169. 



ordinary, 169. 

 Realgar, 294, 606, 640. 

 Reagents, 559, 560. 

 Reddingite, 655. 

 Reducing flame, 550. 

 Reduction with soda, 579. 

 Reentrant angle, 134. 

 Reflected light, 163. 

 Reflection goniometer, 12, 150. 

 Reflection twins, 140. 

 Refraction, 164- 



double, 168. 



indices of, 165. 



mean index of, 171. 

 Refractometer, 212, 213. 

 Regent diamond, 282. 

 Keinite, 633. 

 Remingtonite, 669. 

 Renselerite, **. 

 Repeated twinning, 142. 

 Replacement, 22. 

 Resinous luster, 279. 

 Reticulated, 269. 

 Rhabdophanite, 657. 

 Rhagite, 650. 

 Rhodium, 582. 

 Rhodizite, 663. 

 Rhodochrosite, 391, 602. 667. 

 Rhodonite, 132, 430, 604. 

 Rhombic dodecahedron, 62. 

 Rhombohedral carbonates, 379. 



