466 



PETERSEN, Cheviot rocks ... 43,278 



PETTEKSEN, peridotites 79 



Perlitic felsite 342 



structure 60, 185 



Petrosilex 291 



PFAFF, contents of inclusions ... 25 

 PHILLIPS, J. A., Aberdeen granite . . . 324 



- analyses by 231, 238, 275 



811, 334, 341, 347, 368 



- Cornish elvans ... 333 



- Cornish rocks ... 313 



- Duporth rock . . . 129 

 enstatite-diorite ... 273 



- fluid-inclusions . . 26 



granite of Newry... 331 



greenstones 229 



- mica-trap 355 



- Peterhead granite 324 



- serpentine 124 



Shap granite ... 822 



- Steamboat Springs 412 



Phonolite 360,367 



Picotite in serpentine 120 



Picrite 80, 81, 82, 94, 97, 124 



Pilite 86 



Finite 305,334 



Pitchstone 293,344 



" Pitchstone-porphyrite " 278 



Plagioclase, of the nepheline and 



leucite rocks 363 



dynamic metamorpho- 

 sis of 175,233 



of peridotites 93 



- of serpentine 119 



of basic igneous rocks 137 



of intermediate rocks 259 



of acid rocks 299 



of mica-traps 852 



of contact-rocks . . . 884 

 PLAYER, analyses by ... 321,347,348 

 Plutcnic rocks, specific gravity ... 49 

 POHLMANN, mica-diorite and ker- 



santite 356 



Porphyrite 258, 280 



Porphycitic texture 52 



Porphyroid 294,337 



Propylite 255 



Proteolite 885 



Proterobase 135, 232, 237, 288, 240, 245 



Pseudo-amygdaloids 194 



Pseudo-spherulites 16, 83 



Pseudophite 107 



PUMPELLY, lustre-mottling 81 



pseudomorphs after fel- 

 spar 148 



Pyrites 169 



oxidation of 46 



Pyroxene, inclusions in 29 



metamorphosis of 160 



Pyroxene, of acid rocks 304 



of basic rocks 155 



of intermediate rocks . . . 261 



of mica-traps 353 



of peridotites 87 



of the contact rocks . . . 384 



Pyroxene-porphyrite 280, 283 



Pyroxenite (Dana) 71 



- (Doelter) 77 



Q 



Quartz, in andesitic dolerite ... 195 



in acid rocks 300 



in intermediate rocks . . . 260 



of contact rocks 385 



pseudomorphous after 



felspar 315, 412 



Quartz-diorite 263,267,276 



Quartz-felsite 291 



Quartz-gabbro 228 



Quartz-norite 255 



Quartz-porphyry 291 



Quartz-trachyte 292 



Quartz-wedge, use of 268 



QUENSTEDT, serpentine after oli- 



vine 104 



B 



EAMSAY, greenstones of North Wales 214 

 contact-alteration by green- 

 stone 218 



RATH, VOM, forellenstein 133 



tonalite 254 



BENARD, analysis by 335 



- diabase 234 



- peridotites 85 



RENARD AND POUSSIN, fluid inclu- 

 sions ... ... 26 



porphyroids 337 



quartz-diorite . 270 

 EEUSCH, Bergen Peninsula 8 



peridotites 80 



- saussurite 151 



BEYER, igneous magmas 40 



Rhombic pyroxene, of the peridotites 87 



of the basic 



rocks 163 



of the interme- 



diate rocks... 261 



of the acid 



rocks 304 



- of the Whin 



Sill 208 



Ehomben-porphyry 369,371 



