Ch. 7: Index

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	INDEX. 151

	Page. Mount Rubellite, gems at.................... 74 Muscovite, defects in.......-.............. 139-140 defects in, plate showing................. 138 manufacture of........-........... 1-10-141,142 mining of.............................. 140-141 prices of................................. 142 production of............................ 143 occurrence and character of___ Passim 51-112, 139-141 uses of.......................... ...... 141-142 See aho Mica. Muscovite phase, description of.............. 22 X. Newry, pegmatites in........................ 70-78 New Mexico, graphic granite from........... 24 North Topsham, feldspar quarry at........ 116-117 Norway, pegmatites in...............-...... 78-79 rocks at, plate showing........... ...... 18 O. Orthoclase, composition of................... 119 Oxford County, pegmatites in.............. 70-105 V. Paints, quartz for............................ 134 Paris, pegmatites in.....--------........ 33-31, 79-93 schists in, structure of, plate showing----- 34 .structure in, figures showing---------...... 19,84 Pegmatite, age of.....--..................... 14-15 character of..........-................... 15-27 definition of............................. 10 distribution of.....-.................. 10, 43-45 map showing...........- -......... Pocket fluorine phase of......................... 21 lithium phase of........................ 21 inuscovite phase of...................... 22 origin of................................. 27-46 photomicrographs of....... 10,24,20,34,120,124 quartzose phase of....................... 18-19 figure showing....................... 19 relation of, to bordering rocks............ 10-15 schist fragments in...................... 35-36 sodium phase of......................... 21 texture of................................ 22-27 Pegmatite dikes, structure of_____........... 11,13 structure of, figure showing.............. 11 Pemaquid Point, rocks at, plate showing----- 10 Penobscot Bay quadrangle, rocks in......... 15,44 Perry Basin, rocks near...................... 15 Peru, pegmatites in.......................... 93 Pingree, C. P., mica prospect of.............. 70 Plagioclases, composition of............... 120-123 Pockets, gem-bearing, occurrence and character of............................ 27, 53,58-59,71-72,74,82-80,89,110 views of................................. 20,86 Poland, pegmatites in....................... 59-61 Potash-soda feldspars, composition of...... 119-120 Pottery, feldspar for................... 127,128,129 quartz for............................... 138 Poultry grit, feldspar for.................... 129 Pulsifer, P. P., quarry of.................... 5ti-59	Q. Page. Quartz, crystallization of, temperature of.. 36-39 definition of............................. 17 intergrowths of, with feldspar, plate showing........................24,124 milling of.............................. 133-134 occurrence and character of. .Passim50-119,133 prices of................................. 137 production of............................ 136 uses of................................. 134-136 vein of, view of......................... 98 Quartz, rose, occurrence and character of... 137-138 Quartz, smoky, occurrence and character of. 137 Quart zose phase, description of.............. 18-19 R. Pare minerals, effect of, on crystallization.. 29-30 Raoult's law, statement of................... 31 Rockland quadrangle, rocks in.............. 44 Rose quartz, occurrence and character of.. 137-138 Ruling, defects in mica due to............ 139-140 Rumford, pegmatites in............... 20,35,93-97 Rum ford Falls, pegmatites at and near. 34,35,94-95 schist at, feldspar in, plate showing___ 34 S. Sagadahoc County, pegmatites in......... 105-119 St. George River, rocks on.................. 12 Schaller, W. T., on California pegmatites.. 42 Schists, foliation of........................ 11-12 structure of, plate showing.............. 34 Scouring, feldspar for........................ 129 quartz for............................... 134 Silicon, quartz for........................... 135 Small Point feldspar quarry, description of.. 108 Sodium phase, description of................ 21 South Glastonbury, Conn., quartz vein at, view of.......................... 98 Southport, rocks near....................... 14 South YVaterford mica prospect, description of............................. 103-104 Spanish topaz, nature of................... 137,147 Spence Hills, pegmatites in.................. 98 Spodumene, definition of.................... 18 fiuidal cavities in........................ 77,88 figure showing....................... 77 Spence Point, pegmatites near............... 66 Standish, pegmatites in..................... 98 Sterrett, D. B., on mica................... 141-142 Stoneham, diabase dike in, plate showing ... 98 pegmatites in.......................... 98-102 Stoves, mica for............................. 141 Stow, pegmatites in......................... 102 Streaked Mountain, pegmatites of..... 35-36,74-75 Sugar Hill, gems at......................... 99-100 Sweden, graphic granite from................ 125 Syenite porphyry, occurrence and character of............................... 69 T. Teeth, artificial, feldspar for................. 129 Texture, photomicrograph showing.......... 10 variations in............................ 10

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