INDEX TO PART IV. 
Fluorite, - 
se in granite, 
Formation of metamorphic diorites, 
Fossiliferous limestone, . 
Fossils, flattening and distortion of. 
Fragmental rocks, , 
Franconia granite, . 
Gabbro, . 
«altered 5 
“© relation to diabage, 158, 
Galenite, . ; , ‘ 
Garnet, . 
ee altering to chlorite, : 
a impurities in # . 
Garnetiferous mica schist, 
Gneiss, és 
Gold, ‘i 
Granite, . 5 . : 
ee classification of . F , 
te veins, : . : . 
Granitell, 
Granitic gravel, : 
ee porphyries, , 
v6 rocks, f a ; ‘ 
Graphic granite, . : . 201, 
Graphite, ‘ ‘ ¢ - ‘ 
Greenstones, . . Zz ‘ 
es age of , ‘ r 
Green vitriol, . ‘ 
Haverhill granite, , 
Hematite, : 
Hemithrene, . 
Hexagonal crystals, optical proper- 
ties of . 
Hollow crystals i in diorite, 
Hornblende, ‘ F 
ee alteration of . 66, 
ee associated with augite, 
[x7 ce 
ss biotite gneiss, 
ee granite, 
ie pleochroism of 
ce schist, 
sienite, : 
Hubbard, Prof. O. P., researches of 
Hunt, Dr. T. S., researches of 
Hydro-mica slate, 
Hydrous silicates, 
Hypersthene, . 
Idocrase, 
Impurities in minerals, 
Indicolite, e 
Indigenous granite, 
Infusorial earth, 
lolite, 
VOL. IV. 32 
Page. 
Iron (native), - 23 
‘« pyrites, . at 
Isometric crystals, optical properties 
of : : = aE 
Jackson, Dr.C. F., geological report 
of ¥ é 2 : - 19 
Jasper, . 5o 
Kalinite, r E ‘ . 126 
Kaolin, . ‘ Z x ‘ . 14 
Labradorite, - : . . 92 
s boulders at Stark, 169 
es porphyry, 154 
Lepidomelane, : : 81 
Limestone, . : 127 
Limits of rock species, a - 140 
Limonite, - 46 
Liquid carbonic acid in rocks, . : + 207 
List of minerals found in New Hamp- 
shire, . 20 
List of rocks found in New Hamp- 
shire, . : é - 143 
Lithia in biotite, z 81 
Lodestones, : . z 42 
Lyman schist, . : 5 . 218 
Macles of staurolite, 109, 220 
Magnetic pyrites, 30 
Magnetite, 41 
Hs as decomposition product, 43 
as in diabase, 42 
Malachite, 131 
Marble, 128 
Marcasite, 32 
Marceline, 59 
Margarodite, ‘ 116 
Marlborough granite, eT 
Massive debace, a 
Measurement of crystals i in sections, 9 
Melaconite, " 37 
Melanterite, 126 
Menaccanite, . . 39 
Mesozoic eruptive rocks, . 146 
Metamorphic diorite, + 225, 234 
Meteorite, yf ‘ . 24 
Mica, . 78 
Micaceous diabase, . : . 152 
s quartz schist, + 223 
Mica diorite, + 165 
** hornblende granite, . 198 
‘« schist, at 
Microcline ce 
: 102 
Microlites, 
Microscope for examination of min- 
erals, ‘ 4 ? 8 
