TABLE OF CONTENTS. XV11 



Page. 

 SECTION III- 



The natural properties common to both Simple and Compound 

 Minerals. 



.86. Division, 103 



The Optical Properties of Minerals. 



.87. Lustre, Color, Transparency, . . . . . 103 



.88. Kinds and Intensity of Lustre, 104 



. 89. Series in the Differences of Lustre, ..... 106 



.90. Division of Colors, 106 



.91. Metallic Colors, 107 



. 92. Non-Metallic Colors, 107 



. 93. Series of Colors, Ill 



. 94. Peculiarities in the Occurrence of Colors, . . . Ill 



.95. The Streak, 113 



.9G. Degrees of Transparency, 114 



The Physical Properties of Minerals. 



. 97. State of Aggregation, 115 



. 98. Hardness, 116 



. 99. Specific Gravity, 120 



. 100. Magnetism, 123 



. 101. Electricity, 123 



. 102. Taste, . .124 



. 103. Odor, 124 



PART II. 



CLASSIFICATION. 



. 104. Identity, 130 



. 105. Difference, . . . . ' 132 



