TABLE OF CONTENTS. 
CHAPTER I. 
Preliminary observations . Page 1 
CHAPTER II. 
TOPOGRAPHICAL SKETCH OF THE STATE. 
Topographical outlines, page 3. Division of the State into agricultural districts, 4 : Northern and Southern Highland 
districts, 4 & 5; Eastern district, 6; Hudson and Mohawk district, 7; Western or Wheat district, 8; Southern 
district, 9; Atlantic district, 10. Letter from D. Thomas, 8. 
CHAPTER III. 
CLIMATE AND TEMPERATURE OF THE STATE. 
Letter from J. H. Coffin, page 11. Variation of temperature from difference of elevation, 12; from difference of 
latitude, 14. Kirwan’s and Brewster’s formulae for mean temperature, 16. Forwardness of seasons, 18. Climate 
of Long island, 20; of the valley of the Hudson, 21; of the valley of the Mohawk, 23; of the region north and 
northwest of the valley of the Mohawk, 26; of the region south and southwest of the valley of the Mohawk, 28; 
of the western part of the State, 30. 
CHAPTER IV. 
AGRICULTURAL GEOLOGY. 
Soils derived from the decomposition of different rocks, page 33. Classification of rocks, 35. Composition of simple 
minerals, 39. Character of granitic soils, 42. Drifted soils, 43. 
CHAPTER V. 
THE TACONIC SYSTEM. 
General view of the Taconic system, page 45. Opinions of geologists on the Taconic and Cambrian systems, 46. 
Hudson river rocks, and Champlain division, 49. Rocks below and older than the Taconic system, 52. Position 
and relations of the Taconic system, 54. Individual members of the Taconic system, 61: Black slate, 63; Taconic 
slate, 65; Sparry limestone, 72; Magnesian slate, 75; Stockbridge limestone, 78; Brown sandstone or Granular 
quartz, 83. Rocks immediately above the Taconic system, 87. Taconic system in Rhode-Island, 90. Taconic 
system in Maine, 94. Taconic system in Michigan, 101. Derangements of the Taconic system, 102. Mineral 
products of the Taconic system, 105. Appendix to the Taconic system, 109. 
