460 



PAGE 



Basic Eocks, Scotland 171,184 



- South Wales 222 



West of England ... 228 



Basic tuffs 281,247 



Bastite 88, 117 



BECHE, DE LA., serpentine 



BECKE, centric structure 



micro-perthite 



pilite 



zones round olivine 



BECKER, decomposition of igneous 



rocks 



- Steamboat Springs 

 the Comstock lode . 



38, 

 15, 



120 



31 



86 



165 



415 



412 

 415 

 345 



Belonites, in Arran pitchstone 



Belonospherites 308 



BERRY, analyses of Charnwood rocks 271 

 BETTENDORF, Tardree sanidine ... 



Biotite-dolerite 



Biotite, of basic rocks 



of ultra-basic rocks . 



BISCHOF, the genesis of serpentine. . . 

 BLAKE, felsites of Pembrokeshire... 



granite of St. David's 



BOASE, Cornish rocks 



cornubianite and proteolite 



348 

 232 

 168 

 92 

 107 

 335 

 818 

 313 

 385 

 846 

 240 

 336 

 818 



BONNEY, Arran pitchstone 



- basic dykes at the Lizard... 



devitrified rhyolites 



Dimetian rocks 



- euphotide 182 



-gabbro 173, 178 



hornblende-picrite 97 



luxullianite 294 



Ordovician felsites 336 



- picrite 81 



- pyroxene in picrite 89 



- rhyolitic tuffs 841 



rocks of Eycott Hill 225 



- rocks of Twt Hill 319 



- schistose felsites 837 



secondary enlargements of 



hornblende 91 



- serpentine 110, 116, 172 



- troctolite 172 



trowlesworthite 294,316 



BONNEY AND HILL, diorites of the 



Channel Islands 267 



-- granites of Leices- 



tershire 



on andesitic tuffs 



syenites of Charn- 



321 



284 



wood forest 270 



BONNEY AND HOUGHTON, mica-traps 850 



BORICKY, basalt 137 



- " Nepheline-picrite " ... 369 



BREON, augite-andesite 195 



microgranulite 328 



the dolerites of Iceland 58, 184 



PAGE 



BREWSTER, fluid inclusions 22 



BROGGER, contact-metamorphism... 876 



metamorphosis of rocks 



near fault-planes ... 419 



nepheline-syenite 358 



- parallel structure in 



eruptive rocks 312 



- peridotite 79 



rhomben-porphyry . . . 871 

 BROGNIART, diabase 134 



- melaphyre 186 



Bronzite, of ultra-basic rocks ... 87 



Brown mica, of contact-rocks 235, 383 



Buchonite 360 



Bulk-analysis 39 



BUNSEN, the two magmas 44 



Bunsen's law 45 



By townite, analyses of 146 



C 



CALLAWAY, passage of felsite into 



schist ... 841 



rocks of Donegal 390 



Camptonite 851 



Carbon-dioxide, in fluid-inclusions 25 

 Carbonates, development of in 



igneous rocks 46 



Cassiterite 806 



CATHREIN, leucoxene 167 



saussurite 149 



Centric structure 31 



Chemical characters of igneous 



rocks 87 



Chiastolite 382 



Chlorite, in ultra-basic rocks ... 98 

 Chlorite-schist, development by de- 

 formation of diabase ... 216, 233 



Chrome-diopside 88 



Chromite, in serpentine 120 



CHRUSTSCHOFF, secondary glass-in- 

 clusions 21 



Cbrysotile 117 



Clay- slate, effects of granite on ... 373 



"Claystone" 846 



COHEN, hornblende-picrite 82 



COLE, analyses by 339 



augite-diorite 134 



igneous rocks of Eadnor- 



shire 222 



Ordovician felsites 336 



COLLINS, analyses by ... 124, 180, 856 



Duporth rock 129 



mica-traps 850 



- serpentine 124 



Comstock Lode 414 



Concretionary patches in granite... 811 



Consolidation of igneous magmas 34 



