﻿INDEX 
  

  

  The 
  superior 
  figure 
  shows 
  the 
  exact 
  place 
  oii 
  the 
  page 
  n 
  ninths 
  ; 
  e. 
  g. 
  121'^ 
  

   means 
  seven-ninths 
  of 
  the 
  way 
  down 
  page 
  121. 
  

  

  Acadian 
  group, 
  1431, 
  1442. 
  

  

  Actinolite, 
  1215. 
  

  

  Adirondacks, 
  Plntouic 
  rocks, 
  124^, 
  1392; 
  

   Archaean 
  rocks, 
  140^-413 
  ; 
  limestone, 
  

   1428 
  . 
  sandstone, 
  142^, 
  144"^ 
  : 
  iron 
  

   ores, 
  2186. 
  

  

  Aeons, 
  see 
  Geologic 
  time. 
  

  

  Aguoiozoic 
  series, 
  135^, 
  141'*. 
  

  

  Air, 
  1193; 
  geologic 
  changes 
  produced 
  

   by, 
  1284, 
  1792, 
  2395. 
  

  

  Albany 
  county, 
  Hudson 
  river 
  group, 
  

   149® 
  ; 
  lower 
  Helderberg 
  group, 
  157^. 
  

  

  Albite, 
  1212. 
  

  

  Amphiboles, 
  1215. 
  

  

  Audesite, 
  1212, 
  1252. 
  

  

  Animals, 
  classification, 
  130-31. 
  

  

  Anorthite, 
  1212. 
  

  

  Auorthosite, 
  1411. 
  

  

  Anthony's 
  Xose, 
  1245, 
  

  

  Antwerp 
  red 
  hematites, 
  219^. 
  

  

  Apatite, 
  localities 
  producing, 
  233^. 
  

  

  Aragonite, 
  120®. 
  

  

  Archaean 
  series, 
  1385-406; 
  term 
  defined, 
  

   1385; 
  exposures, 
  138^-414; 
  typical 
  

   localities, 
  1406-41*. 
  

  

  Archaean 
  time, 
  135^. 
  

  

  Archaeopteryx, 
  172*^. 
  

  

  Argillite, 
  196i. 
  

  

  Aristotle, 
  geologic 
  observations 
  of, 
  

   113'^. 
  

  

  Arrow-heads, 
  material, 
  173"^. 
  

  

  Arsenic, 
  localities 
  producing, 
  231^. 
  

  

  Asbestus, 
  12r. 
  

  

  Ashburner, 
  C 
  : 
  A., 
  articles 
  on 
  produc- 
  

   tion 
  of 
  oil, 
  2282. 
  

  

  Asphalt, 
  1227. 
  

  

  Atmosphere, 
  see 
  Air. 
  

  

  Augite, 
  1218, 
  1252. 
  

  

  Barite, 
  localities 
  producing, 
  233^. 
  

  

  Basalt, 
  1252; 
  constituents, 
  1218. 
  

  

  Beaver, 
  fossil, 
  1789. 
  

  

  Beck, 
  L. 
  C, 
  mineralogist, 
  2418. 
  

  

  Biotite, 
  1222. 
  

  

  Birds, 
  of 
  Jurassic 
  period, 
  172^; 
  of 
  

  

  Tertiary 
  period, 
  1756. 
  

   Biidseye 
  limestone, 
  1475, 
  1479-48^ 
  2005. 
  

   Bishop, 
  I. 
  P., 
  photographs 
  by, 
  llO^. 
  

   Black 
  lead, 
  122^. 
  

   Black 
  marble, 
  1485. 
  

   Black 
  river 
  limestone, 
  1475, 
  148*. 
  

   Blue 
  Ridge, 
  formation, 
  1516. 
  

   Bluestone, 
  192*-933. 
  

   Boundary 
  line, 
  resurvey, 
  245^. 
  

   Breakneck 
  mountain, 
  1245. 
  

   Bronze 
  age, 
  179^. 
  

   Bronzite, 
  1222. 
  

  

  Brown 
  hematite 
  ore, 
  see 
  Limouite. 
  

   Browustone, 
  195*. 
  

   Building 
  stones, 
  1483, 
  149^, 
  152^, 
  1606, 
  

  

  181-204. 
  

   Burden 
  iron 
  mines, 
  2221. 
  

  

  Calcareous 
  tufa, 
  120^, 
  2032 
  ; 
  localities 
  

   producing, 
  2342. 
  

  

  Calciferous 
  group, 
  1468-47*. 
  

  

  Calciferoiis 
  sandrock, 
  1996. 
  

  

  Calcite, 
  1206 
  • 
  localities 
  producing, 
  

   2342. 
  

  

  Cambrian 
  system, 
  138*, 
  1422-46^; 
  origin 
  

   of 
  name, 
  142*; 
  depth 
  in 
  Washington 
  

   county, 
  1459 
  ; 
  life 
  of, 
  1461. 
  

  

  Cannon's 
  Point, 
  1246. 
  

  

  Carbonate 
  of 
  lime, 
  localities 
  produc- 
  

   ing, 
  2342. 
  

  

  Carbonate 
  ores, 
  2219-22*. 
  

  

  Carbonic 
  acid 
  gas, 
  2288. 
  

  

  