:i7() 



INULX. 



Composition of soils of the Higli- 

 land district, 237. 



— granitic soil, 239. 



— soil of Peekskill, 240. 



— — Chatham, 243. 

 Compounds of oxygen, etc. 223. 

 Concretions, analysis of, 261. 

 Delthyris shaly limestone, 167. 

 Derangements of the Taconic sys- 

 tem, 102. 



Devonian system, 187. 

 Diluvial action, 214. 

 Division of the State into agricul- 

 tural districts, 4. 



— according to temperature, 19. 

 Drifted soils, 43. 



Eastern district, 6. 



Effect of elevation on temperature, 

 14. 



Elements of soils, 220. 



Equivalency of the Upper New- 

 York rocks, 198. 



— of the Medina sandstone, 142. 

 Era of diluvial action, 217. 



Erie division, 116, ISO. 



Extracts from Professor Rogers's 

 address, 47. 



Final cause of diluvial action, 217. 



Forest vegetation of the Southern 

 district, 306. 



P'orwardness of the seasons, 18. 



Fossils of the Taconic slate, 68. 



Fractures of the Champlain divi- 

 sion, 133. 



— at Montmorenci, 138. 



— in Essex, 137. 



— at Becraft's mountain, 136. 



— in Saratoga, 134. 

 (ienesee slate, 189. 

 Granitic soils, 42. 



— extent of, 38. 

 Granular quartz, 83. 



— mineral contents, 85. 



— range and extent, 85. 

 Green shale, 155. 

 Hamilton shale or slate, 183. 



— mineral contents, 184. 



— relations of, 184. 

 Helderberg division, 116, 153. 

 Highland district, 4-7, 236. 

 Hydrogen, 222. 



Isle Laniotte marble, 123. 

 Jackson's analysis of the hydraulic 

 limestone, 275. 



Kirwan's furinu'.a for me^ui teiniie- 



rature, 16. 

 Lakes containing marl, 297. 

 Letter from D. Thomas, S. 



— from J. H. Coffin, 11. 



— from B. F. Johnson, 25s. 

 Lime, 228. 



Limestone stratum of the Marcellus 

 slate, 1S2. 



Limestone, marl, etc. as manures, 

 313. 



Limestones of New-York, composi- 

 tion of, 354. 



Lithological characters of the rocks 

 of the Taconic system, 61. 



Magnesia, 228. 



Magnesian slate, 75. 



— mineral contents, 76. 



— range and extent, 77. 

 Manures of the Wheat district, 297. 

 Marble, 107. 



Marcellus slate, 181. 



— relations of, 181. 

 Marl and peat, 204. 



— of New-York, comp. ol, 357. 

 Medina sandstone, 142. 



— thickness of, 143. 

 Metamorphic rocks, 105. 

 Metamorphism, observations on, SI. 

 Meteorological tables of the Atlantic 



district, 32l'- 2. 



— of the Hudson district, 268-9. 



— of the Southern district, 315. 



— of the Wheat district, 303. 

 Mica slate, Jackson's analysis, 356. 

 Mineral products of the Taconic 



system, 105. 

 New Red sandstone, 200. 



— how distinguished, 201. 



— footmarks in, 201. 

 New-York system, 113. 

 Niagara group, 150. 

 Niagara limestone, 151. 

 Niagara shale, 151. 

 Nitrogen, 222. 



Observations on metamorphism, 81. 



— on the rocks which rest upon 

 the Taconic system, S7. 



— on analysis, 327. 

 Old Red sandstone, 187. 

 Oneida conglomerate, 123. 

 Ontario division, 115, 141. 

 Onondaga limestone, 174. 



— extenl and tliicknes;-, 17.'i 



Oiifindaga limestone, relations of, 

 176. 



— natural joints, 176. 



— agricultural characters, 176. 

 Onondaga-salt group, 153. 

 Origin of New-York soils, 206. 

 Oriskany sandstone, 168. 



— character and thickness, 169, 



170. 



— peculiarities of, 176. 



— relations of, 176. 

 Oxide of iron, 229. 



Oxide of manganese, 106, 229. 



Oxygen, 220. 



Peat, 204. 



Peekskill soil, 241. 



Peiitamerus limestone, 158. 



Petersburgh soil, 243. 



Physical characters of the surface. 



124. 

 Phenomena of diluvial action, 209. 

 Porous limestone, 158. 

 Portage group, ISS. 



— thickness of, 189. 



— Ithaca and Chemung groups in 

 the Hudson district, 192. 



— places of examination, 193. 

 Potash, 225. 



Potsdam sandstone, 117. 



— how distinguished, 118. 

 Primary explained, 35. 

 Premium crops, 349. 



— of wheat, 349. 



— of maize, 349. 



— of oats, 350. 

 Premium crops for 1846, 351. 

 Properties and functions of the 



elements of soils, 220. 

 Relations of the Hudson river rocks, 

 49. 



— of rocks older than the Taconic 

 system, 52. 



— of the Champlain division, 140. 



— of the Clinton group, 148. 

 Retentiveness of soils, 350. 

 Roojing slate, 71. 

 .Scholiarie grit, 174. 



Scored surfaces, 211. 



Secondary explained, 35. 



.Septaria, 182. 



Series of rocks at the falls of the 



Genesee, 1 10 - 7. 

 Silox, 227. 

 M.Ucs, analysis of, 345 - t'l 



