

41 



Statistics for 1855. 



4 miners $384 



2 engineers 200 



1 battery tender - 100 



2J cords wood per day, $3 50 192 



2 stokers 160 



Incidentals 200 



$1,236 

 Ore reduced per month, 338 tuns ; average value $15. . . $4,010 



Aggregate receipts for 8 months $32,560 



" expenses " 9,888 



Balance in favor $22,672 



The workings of this mine thus far have been confined mostly to the surface. 

 No considerable depth has as yet been attained upon the lode. The affairs of 

 the company appear to be managed in a prudent and economical manner. Their 

 machinery is light but effective for its weight. 



OSBORN HILL MINE, GRASS VALLEY, NEVADA COUNTY. 



The Osborn Hill Mine and that of the Lawrence Hill, adjoining, and which is 

 the property of one company, are situated about two miles east of the town. The 

 reduction works of the company are situated on Wolf Creek, near the middle of 

 the village. The mine was one of the earliest that was opened in the State, and 

 has continued in active operation since the early part of 1853. As was the usual 

 case with most of the veins that were worked during that period, this mine, like 

 others, was worked without much system until the latter part of 1853, when the 

 company adopted a much more systematic course than had been N previously 

 observed. 



During 1853 the following work was done upon the lode of Osborn Hill : An 

 adit was driven to the intersection of the vein on one side, to the length of one 

 hundred and ninety feet. At the contact the lode was found to have a dip of 

 twenty-seven degrees. From the termination of the adit two levels were carried 

 to the length of one hundred and twenty feet each, and one winze sunk to the 

 depth of twenty-five feet. At the bottom of the four-fathom winze the lode had 

 acquired an angle of forty-one degrees. Subsequent to this another adit was 

 commenced fifty feet below the former and carried to the length of one hundred 

 and twenty-five feet, the last fifty feet of which was carried into the green-stone 

 trap, which was very hard and compact. 



From the very heavy expenses attending the driving in this rock and the great 

 distance that it would be necessary to carry it, the enterprise was abandoned. 



At this time there was considerable water in the mine, and as the season 

 advanced it was judged most prudent to abandon this part of the lode for the 

 present and attack it at a more advantageous point, with the exception of the 

 extraction of such ores as were available above the points of drainage. Accord 

 ingly in 1854 the lode was opened on Lawrence Hill some six hundred feet to 



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