INDEX 



355 



Palaeozoic sediments, petrography 

 of, 338 4 ; erosion of, 339 4 . 



Pease pits, 339 9 , 346 7 . 



Pease quarry, gneiss, 335 8 . 

 •Petrography, of anorthosites, 336 5 -38 4 ; 

 of black schists, 33i 8 -36 5 ; of gab- 

 bros, 336 5 -38 4 , 347 6 ; of gneisses, 

 332 3 -33 8 , 344 6 , 346 2 , 347 1 ; of lime- 

 stones, 333 8 -36 5 ; of palaeozoic sedi- 

 ments, 338 4 . 



Philadelphia, kindred formations near, 

 335 4 . 



Phosphates, production, 342 9 . 



Pilfershire mine, limestones near, 

 3i3 9 ; dike, 336 1 . 



Pilfershire pits, 339 9 , 346 7 , 



Pitch, relation to dip, 341 7 . 



Port Henry, black schist, 33 1 1 ; gneiss, 

 335 8 ; Lee mine, 346 8 ; limestone, 

 330 9 , 331 7 , 333 9 ; olivine in gabbros, 

 33b 3 ; quarry, 329 9 ; silicates, 334 9 - 

 35 5 ; T. S. Hunt's paper on geology 

 of, 326 2 . 



Potsdam sandstone, 330 7 , 331 7 , 332 8 , 



338 5 , 3d9 2 . 

 Potts shaft bed, 342 G -43 3 . 

 Pumpelly, R., report on geology about 



Westport, 326 3 . 

 Putnam, , quoted, 342 8 , 346 9 , 347 3 , 



346 2 ; acknowledgments to, 344 2 . 



Ries, H. P., Pleistocene lake-bed at 

 ELizabethtown, 328 9 . 



Sanfbrd bed, 342 3 . 



Schists, petrography of, 333 8 -36 5 . 



Sedimentary rocks, 339 4 ; bordering 

 Lake Champlain, 327 6 ; general char- 

 acter, 330 7 ; petrography, 338 4 . 



Serpentinous marbles, 334 2 . 



Shear- zone at Avalanche lake, 328 4 . 

 Silicates accompanying limestone, 



334 8 -35 7 . 

 Silurian shales, 339 2 . 

 Smock, J: C, quoted, 349 6 . 

 Smyth, C. H. jr, paper on geology of 



Gouverneur township, 326 7 ; quoted, 



336 3 . 

 South pit, 346 5 . 



Split Rock mountain, anorthosites, 

 332 3 ; olivine in gabbros, 338 s ; mines, 

 349 9 -50 4 . 



Stratigraphy, general, 328 8 -29 4 ; of 

 crystalline rocks, question of, 325 5 . 



Table, of analyses, 340 3 . 

 Teflft shaft, 343 6 . 



Titaniferous ores, 340 4 , 350 6 ; general 

 features, 340 9 -41 2 ; mines bearing, 

 339 7 . 



Topography, general, 327 4 -28 7 . 

 Trenton limestone, 330 9 , 332 3 . 



Van Hise, C. R., report on geologj 



about Westport, 326 3 . 

 Vogt, J. H. L., paper, 350 9 . 



Wadsworth., M. E., paper, 350 8 . 

 Walcott, C. D., report on geology 



about Westport, 326 3 . 

 Warren county, serpentinous marbles, 



334\ 



Welch shaft bed, 342 3 , 344 3 . 



West Point dikes, 335 9 . 



Westport, anorthosites, 336 6 ; geology 



of, 326 3 , 332 2 ; iron mines, 349 2 -50 4 ; 



limestones near, 330 9 ; mines, 339 7 ; 



mirjing prospects, 350 5 . 

 Witherbee, Sherman & co., specimens 



in office, 344 9 -45 J . 



