TABLE OF CONTENTS. 
Preface,. 
Page. 
1 
Range and extent of primitive lime- 
Page. 
stone,. 
61 
CHAPTER I. 
Duality of the lime obtained from it,. 
63 
Of the geographical relations of the North- 
Its character as a mining rock,. 
64 
ern Division of the State of New-York, 
9 
Simple minerals found therein,. 
64 
Mountain ranp'es,. 
11 
TT.se of lime.stone in ao-riculture,. 
65 
Valleys,. 
12 
Some inquiries which follow from the 
Table of heights of some important points 
establishment of the theory of the 
in the Second district,... 
17 
igneous origin of primitive lime- 
stone,. 
65 
CHAPTER II. 
4. 
Serpentine,. 
67 
Some of the objects of Geology stated. What 
Localities of serpentine,.. 
69 
was known of the geology of the Second 
Origin of serpentine,. 
70 
district at the commencement of the Sur- 
Mineral associates of serpentine, .... 
71 
vey. General views of the primary and 
5. 
Rensselaerite,.•. 
72 
sedimentary rocks, and an outline of 
Origin of rensselaerite,. 
74 
their boundaries,. 
18 
Localities and extent,. 
74 
Primary formations of the northern divi- 
sion of the State,. 
22 
CHAPTER HI. 
Classification of the Primary rocks, ,... 
23 
Stratified rocks. 
75 
1. Granite,. 
23 
1. 
7c 
2, Hypersthene,. 
27 
Dip and strike,. 
77 
Varieties of hypersthene,.. 
28 
Mountain ranges composed of gneiss. 
77 
Jointed structure,. 
30 
Gneiss as a mining rock,. 
78 
Limits of the hypersthene,. 
32 
Imbedded minerals,. 
79 
Distribution of hypersthene boulders. 
33 
2. 
Hornblende,. 
79 
Clay from h3rpersthene,. 
34 
3. 
Talc or steatite,. 
80 
3. Primitive limestone,.. 
37 
4. 
Sienite,... 
80 
Igneous origin of limestone,. 
38 
Some effects of limestone on imbedded 
CHAPTER IV. 
minerals. 
57 
Subordinate rocks,., . 
82 
Varieties of primitive limestone,. 
59 
1. Trap,. 
82 
Geol. 2d Dist. 
