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NEW YORK STATE MUSEUM 



Little pit, Palmer hill mines, ioo, 101. 



Little pond mines, 167-68. 



Long Lake quadrangle, report on 

 geology of, 11.. 



Long Pond mine, 44, 55-56. 



Lovers Hole, 84. 



Lowville formation, 19. 



Lundrigan pit, Palmer hill mines, 

 100. 



Lyon mountain, 108; geology, 108- 

 14; magnetites, 16, 23, 25, 26; 

 igneous series, 27. 



Lyon Mountain mines, 33, 105-24; 

 analyses, 120-22 ; concentrating 

 plants, 34; main group, 1 16-18; 

 statistics of ore production, 35, 

 124; sketch map showing distri- 

 bution of ore bodies, 107; vertical 

 section across ore bodies, 119. 



McCreath, A. S. & Son, analysis by, 



154. 



Mace deposit, 90, 105. 



Mclntyre, A., mentioned, 156. 



McKenzie brook, 59. 



Magnesia, 45, 139. 



Magnetic concentration, 34. 



Magnetic Iron Ore Co., 132, 137. 



Magnetites, earliest operations date 

 back to about 1800, 6; found in 

 gneisses, 16, 27, 30; gabbros, 17; 

 anorthosites, 17; syenites, 18, 28; 

 granites, 30; 



nontitaniferous: 6, 23-145; ori- 

 gin, 30-33; statistics of ore pro- 

 duction, 6, 35-36; mines near Fort 

 Ann, 37-40; Crown Point mines, 

 40-43; Hammondville mine group, 

 43-56; Mineville-Port Henry mine 

 group, 57-88; Minerva mine, 89- 

 90; Arnold hill and Palmer hill 

 mine group, 90-105; Lyon Moun- 

 tain mines, 105-24; Saranac valley 

 mines, 124-28; St Lawrence county 

 mines, 128-42; Salisbury mine, 



142-45 ; 



titaniferous : 6, 7, 62, 67, 146-70; 

 Lake Sanford deposits, 155-64; 

 Moose mountain deposits, 164; 



Split Rock mine, 164-66; Lincoln 

 pond mine, 166-67; Little pond 

 mine, 167-68; Port Leyden mine, 

 168-69. 



Manganese, Arnold mine, 98; Ben- 

 son mines, 136; Clifton mines, 141, 

 142; Cook mine, 104; Finch and 

 Chalif ou pits, 99 ; Fine, mines, 139 ; 

 Lyon Mountain mines, 121 ; Nelson 

 Bush mine, 96; Parkhurst mine, 

 123; Potter mine and Baker open- 

 ing? 38; Skiff mine, 55. 



Maps of region, 11. 



Marble, 9. 



Martite, 26, 52, 96, 98. 



Maynard, George W., analyses by, 

 39, 53, 54, 55, 56, 98, 99, 166; cited, 

 41, 172. 



Mica, found in gneisses, 45, 46, 131, 

 140; granites, 18; limestones, 13; 

 magnetites, 39, 160; quartzites, 

 14, 15; schists, 15, 37, 45, 46, 48, 

 50, 67, 140. 



Microcline, found in gneisses, 89, 91, 

 no, in, 125, 132, 169; granites, 28, 

 37, 41, 46; magnetites, 101, 113; 

 pegmatite, 114. 



Microperthite, found in gneisses, 15, 

 27, 89, 91, 103, 109, in, 127, 169; 

 granites, 126; hematites, 43; mag- 

 netites, 113; syenites, 18, 28, 46, 63, 



65, 93- 



Middleville, syenites, 143. 



Mill brook, 61. 



Miller pit, 74, 80. 



Mineral deposits other than iron ores, 

 9- 



Minerva mine, 89-90. 



Minerva stream, 89. 



Mineville deposits, 23, 24, 25, 28, 66, 

 71-82; analysis, 82; concentrating 

 plants, 34; glacial drift, 61; sta- 

 tistics of ore production, 35. See 

 also Old Bed group of mines. 



Mineville-Port Henry mine group, 

 by James F. Kemp, 57-88. 



Mining and milling in the Adiron- 

 dacks, 33-35. 



Monocline pyroxenes, 152. 



