465 



Magnetite of basic-rocks 166 



MANN, augite of nepheline and 



leucite rocks 365 



Margarites 14 



Massive rocks, characters of ... 11 

 Mechanical metamorphism, zone of 242 



Melanite 366 



Melaphyre 136,209 



Melilite 366 



Melilite-basalt 868 



MEBIAN, tridymite 301 



Mesh-structure in serpentine 86, 109 

 Metamorphism, agents of ... 8, 410 

 Meteorites, their relation to terres- 

 trial rocks 50 



METHERIE DE LA, peridotites 79 



Miascite 859 



Mica of acid rocks 301,880 



basic rocks 168 



contact rocks 883 



mica-traps 352, 857 



peridotites 92 



the intermediate rocks . . . 261 



Mica-diabase 224,352 



Mica-diorite 852 



Mica-porphyrite 281, 852 



Mica-schist 295 



Mica-syenite 293 



Mica-trap 350 



Microfelsite 807 



Microfelsite, spherulites of 402 



Micro-flaser structure 283 



Micropegmatite ... 30, 57, 180, 827 



an eutetic compound 401 



composition of 402 



Micropegmatite in dolerite 208 



Microperthite 81, 870 



Microcline, characters of 299 



Microlites 14 



" Mikrolithenfilz " 259 



Mineral-inclusions 28 



Minerals of igneous rocks 86 



Minette 850, 857 



Minette-felsite 852 



Monoclinic pyroxene, of peridotites 88 



Mosaic structure 235 



Mother-liquor, of andesitic magmas 48 



N 



217 



NAGY, felspar in chlorite-schist ... 

 NEEF, intergrowths of magnetite 



and ilmenite 31,167 



Nepheline-syenite 858 



Nepheline-augite rock, synthesis of 405 



Nepheline ". 363 



Nephelinite 360 



Nevadite . . 292 



PAGE 



Nickel-iron, in basalt 38 



Nodular felsite 888,849 



Normal-pyroxenic and normal 



trachytic magmas of Bunsen 44 



Norite 183,173 



Nosean ^ 364 



NOURY, rocks of Jersey 267, 357 







Obsidian 



OEBEKKE, chrome-diopside 



lime-olivine ... 



- palseopicrite . . . 

 secondary augite 



293 



89 



84 



80 



260 



Oligoclase-augite rock, synthesis of 404 

 Olivine, alteration into serpentine 84, 104 

 inclusions in 30,241 



in serpentine 118 



-nodules 186,246 



of peridotites 84 



of the basic rocks 164 



of mica-traps 853 



- zones round ... 173, 176, 249 



Olivine-basalt 188, 197, 213, 246 



synthesis of 404 



Olivine-diabase 223 



Olivine-dolerite 96, 183, 195, 210, 241, 



245 



Olivine -hornblende rocks 122 



Ophite 135 



Ophitic diabase 224,232 



dolerite 182,245 



epidiorite 232 



proterobase 237 



structure 58 



structure, artificial produc- 



tion of 405 



Orthoclase of acid rocks ... 296, 830 



of dolerites 147 



of the nepheline and 



leucite rocks 862 



Ottfj all-diabase 242 



Oxygen-ratio 40 



Palaeopicrite 80 



Palagonite 137, 231 



Pantellarite 369 



PEACH and HORNE, volcanic rocks 



of Shetland 347 



Pegmatitic texture 57,212 



dolerite 182 



Pegmatite 291 



Perowskite 866 



Peridotites, analyses of 102 



