88 [APPENDIX 



which form the gangue are found on the west side of the vein, in place of 

 the east as at Davis' mine. This was evidently caused by an unequal dis 

 placement at the period of intrusion of the dike, resulting from the trans 

 verse fracture forming the cross course on which Johnson's mine is situated ; 

 the resistance being less in that direction at the time of fracture in the 

 incumbent rocks. This cross-fracture had the effect also to throw the in 

 trusive mass from a right line at the time it broke through, for the entire 

 length of the dike, giving it at first view the appearancne rather of two 

 sets in place of one which they in reality are. There are many similar 

 features attending the veins of this country, which has created no little con 

 fusion in regard to their true position ; and of themselves though they may 

 appear insignificant, yet with the miner they involve questions of high impor 

 tance, and exert an influence either prejudicial or favorable upon his opera 

 tions, as their position may be clearly or distinctly known. 



The study of our system of metallic veins and its correct development, 

 involves some of the most important interests of the State ; a correct 

 knowledge of their position is much desired, but as the limits of this report 

 will not admit that examination which they require, further allusion to the 

 subject will be omitted. 



All the vein between shafts and to the point E, has been stopped out with 

 the exception of a small body of vein to support the walls of the mine and 

 attle F F. The mine from its proximity to the creek has considerable water 

 but is kept free by one of Farnham's double-action pumps placed at the 

 shaft B, while the shaft A is used for bringing the ore to the surface. 



AMADORE COMPANY MINE. 



This is situated on the opposite side of the Creek from the Spring Hill 

 mine, and on the same sett. Their operations have been conducted below 

 the bed of the creek, to the depth of nearly one hundred feet. Shaft D is 

 the whim shaft, 97 feet, and is to the depth of 100 feet, at the bottom of 

 which a 37 foot horse has been struck, all the ore from the lower level A C 

 has been stoped out, the points I supporting the ottle. Reference to the 

 sketch will present its position at the date of visiting it. 



The strike of the vein in both the latter, is north by west, diping east 65 

 degrees. 



RANCHOREE MINE. 



Is located one mile north of the preceding, and on the ridge dividing the 

 Amadore and Ranchoree Creeks ; their reduction works are about half a 

 mile west of the town of Ranchoree. 



The upper portion of their vein is situated 420 feet above the creek ; on 

 the vein are three shafts of about 70 feet, and two levels of 110 and 75 feet 

 respectively ; they are now driving on the level I, to obtain drainage and 

 easy transit for their ores to the mill ; the plan of operations will be seen on 

 the sketch marked by the dash lines. The vein at thia lower level gives a 

 good ore, and has the same investing rocks as at the upper levels. The 



