CONTENTS 



Page. 



Letter of Transmittai, v,. III. 



Prefack V. 



Contents IX. 



List of Illustrations XL 



List of Atla-s-sheets XIII. 



Brief outline of results XV. 



Chapter I. — The Comstock Miues 1 



IL^Previous invest isatioDS of thi- ( Vmistock Lode I'i 



III.— Lithology :« 



Section 1. The Rocks of the Washoe District..: 32 



2. The Dec(iiiii>osil Ion of the Rocks ""i 



3. Propylite HI 



4. Detailed desciiption of slides 91 



Descriptiou of illustrations - 145 



Tables of Analyses and Assays 152 



IV.— Structural Results of FanUiug K'(i 



V. — The Occurrence and Succession of Rocks 188 



VL— Chemistry 209 



VII. — Heat Phenomena of the Lode 2'.i8 



Section 1. General Discussion 228 



2. Thermal Survey 244 



VIII.— The Lode 26B 



IX. — On the Thermal Effect of the Action of Aqueous Vapor on Feldspathio Rocks (Kao- 



liuization) hy Carl Barus 290 



X.— On the Electrical Activity of Ore Bodies hy Carl Barus ... 309 



XI. — SuQimary "68 



Note to Chapter III. (on the Determination of Feldspars hy Szab6's Method) 405 



Index to the Mining Claims 409 



General Index 4I-* 



(ix) 



