Geology of Pegmatites in Maine: Index Page 164



	INDEX.

	A. Page. Abrasives, feldspar for....................... 129 quartz for............................... 135 Alaska, graphic granite from................ 24 Albany, pegmatites in....................... 70 . Amblygonite, occurrence ami character of___ 88 Amethysts, occurrence and character of___ 102,138 Andover, pegmatites in..................... 71 Androscoggin County, pegmatites in........ 46-61 Apatite, definition of........................ 16 occurrence and character of. 52-53,58,60,88,101 Appleton, rocks near........................ 69 Aquamarines, occurrence and character of.. 99,146 A-structure, explanation of.................. 139 Auburn, graphic granite in,plate showing.. 22 pegmatites in........................ 11,46-59 plate showing....................... 10 Auburn Falls, pegmatites at................. 46 Auburn reservoir, pegmatites near.......... 46-47 IS. Bay Point Peninsula, pegmatites on.......108-109 Beech Hill mine, description of............ 104-105 mica of............................ 104-105,141 Bennett prospect, mica at................... 70 Berry, A. R., quarry of...................... 59-61 Beryl, definition of.......................... 16 occurrence and character of.............. 52,60, 70,78,92,98-99,101,144-147 See also particular Varieties. Beryllonite, definition of.................... 16 occurrence and character of............. 99-100 Biotite, definition of........................ 17 See also Mica. Black Mountain mine, description of........ 95-97 mica in.............................. 95-96,140 Boothbay Harbor, pegmatites near........ 12,14, 19,35,64-70 pegmatites near, figure showing......... 14 Brunswick, pegmatites in............. 12,13,61-62 Buckfield, pegmatites in..................... 71 Bygden, A., on graphic granite.............. 40 C. ^- Cesium beryl, occurrence and character of... 147 Calcite, definition of......................... 16 occurrence and character of.............. 68-69 Calkins, F. C, on graphic granite............ 24 Cathance, pegmatites near................. 112-114 Cavities, gems in............................ 32-33 See also Miarolitic cavities. Chemical apparatus ware, quartz for...... 135-136 Citrine, occurrence and character of.......... 137 Cobble Hill, pegmatites near................. 78-79	Page. Colombite, occurrence and character of..... 101 Contact-metamorphic effects, occurrence and character of...................... 33-35 Crocker Hill, pegmatites at and near___11,79-81 Crystallization, differences in, effects of. 28-36,45-46 temperature of, effect of................. 36-39 Cumberland County, pegmatites in.......... 61-63 Cumberland Mills, pegmatites at............ 62-63 Cushman, A. S., on feldspar as fertilizer...... 130 D. Dale, T. N., on fluidal cavities............... 21 Danville Corners, pegmatites near........... 47-48 Danville Junction, pegmatites near.......... 48-49 Deer Hill, amethystsat...................... 102 Diabase dike, view of........................ 98 Dikes. See Pegmatite dikes. Diorite, lenses of, plate showing.............. 12 Dunton tourmaline mine, description of...... 76-78 E. Edgecomb, pegmatites in.................... 63-64 Electrical apparatus, mica for............... 141 Emerald, definition of....................... 17 occurrence and character of............ 145-146 Emmons, W. H., on Mount Mica............ 36,83 Eutecties, importance of, in rock formation .......................... 39-43,46 F. Feldspar, analyses of............... 51,106,123,124 commercial availability of deposits of.. 126-127 composition of......................... 119-125 definition of............................. 17 impurities in............................ 127 intergrowths of, with quartz, plate showing............................. 24,124 milling of.............................. 127-128 mining of.............................. 125-126 cost of............................... 126 prices of............................... 130-131 production of............................ 132 quarries of... 51,63-64,72-73,86,105-108,110-117 uses of................................. 129-131 Feldspar brushes, occurrence and character of. 23-25 Ferrosilicon, quartz for...................... 135 Fertilizer, feldspar for....................... 130 Field work, extent of........................ 9 Fisher, J. A., quarry of.................... 112-113 quarry of, graphic granite from, analyses of 124 Fluidalcavities,bands of, plate showing..... 18 149