248 INDEX TO 
Page. 
Basic eruptive rocks, 144 
Baveno twins, . - 99 
ae in quartz porphyry, - 180. 
- 66 
ve 
hes microscopic inclusions in 69 
Bethlehem gneiss, . 214 
Biotite, 79 
«gneiss, 213 
‘* granite, 195 
‘« associated with muscovite, 80, 83 
«¢ muscovite gneiss, 213 
Black argillitic schist, 220 
Blende, 29 
Bog-iron ore, . 46 
Bornite, . 29 
Boulders at Gilford, 169 
“at Thetford hill, 157 
‘© of gabbro, . 169 
a of labradorite at Stark, 169 
Breccia cemented by a porphyry, 184 
‘* granite, . + 197 
“« — of schist, 221 
«« of slate, 222 
Broken crystals of labradorite, 155 
a strata, a ¢ 221 
Brown tourmaline, . 103 
Brush, Prof. Geo. J., services of . 5 
Bubbles in rock cavities, . fs Bees 193 
Buhrstone, 50 
Bunsen’s division of eruptive rocks, 144 
Cadmium in zinc blende, 30 
Calcite, . 5 127 
Carbonic acid in rock cavities, 207 
Carlsbad twins, : 99 
Cassiterite, 44 
Catalogue of mineral localities, 132 
Cavities in acidic rocks, . 181, 192 
ce fluorite, . 37 
te minerals, j é ‘ 9 
Chalcocite, F : 30 
Chalcopyrite, . . 32 
Chalybeate springs, 37 
Chiastolite, . gj 106 
Chiastolite schist, 220 
Chlorite, . 117, 58 
ss schist. 232 
Chloritic diabase, . 150 
Chlorophyllite, 78 
Chocorua granite, 200 
Chromite, 44 
Chrysoberyl, 44 
Chrysolite, 70 
Cinnamon garnet, 73 
Circular polarization, - 18 
Classification of basic eruptive ‘rocks, 148 
ee rocks, 141 
Clay, s F II4 
Clay slate, 236 
Claystone porphyry, 185 
PART Iv. 
Page, 
Cleavage of minerals in sections, 10 
Cleavages in mica, . 80 
Colebrook granite, . 198 
Columbite, 121 
Concord granite, 194 
ae meteorite, . 24 
Concretionary granite, 203 
Concretions of chlorite, : 4 “E21 
Connecticut sandstones, . . » 239 
Contact metamorphism, . ‘ « 3282 
Conway granite, 195 
Copper, 23 
‘*  pyrites, 32 
‘© schist, 220 
Corundum, . : a 5 - 38 
Crystallites, . . 3 : : 9 
ts in clay slates, ‘ - 237 
fe in labradorite, 94 
Cyanite, . 108 
Danaite, : ‘ 34 
Dartmouth college, é 19 
Decay of basic rocks, 172 
ee rocks, 140 
Delessite, 120 
Diabantite, 120 
Diabase, . 149 
Diallage, 165 
Diatoms, P Bz 
Diorite (eruptive) : 159 
‘¢ (metamorphic), . 225 
‘© origin of 160 
Disintegrating granite, 195 
Diversity in eruptive rocks, 170 
es New Hampshire erup- 
tive rock, Fi « 1 
Dixville notch, 238 
Dolomite, 130 
Eaten apatite crystals, 168 
Endogenous granite, 189 
Epidote, . : ‘ 76 
Etch figures on fluorite, ‘ 35 
Exotic granite, 189 
Fahlunite, 78 
Feldspar, 86 
Felsite, 175 
Fetid limestone, 129 
Fibrolite, é 107 
ae mica schist, 216 
Field work upon rocks, 14 
Fitzwilliam granite, 194 
Flattened fossils, 221 
ce minerals in mica, 85 
oe pebbles in schist, . 220 
Fluidal enclosures in rocks, 181, 192 
Flumes, . : - - 147 
