42 ECONOMIC GEOLOGY. 



ence of cupreous boulders on a similar south slope led to a search for their source, and 

 the vein was discovered quite near at hand, and proved to be richer than any others in 

 the district. 



Paddock Company. This is the largest of all the copper companies, embracing 

 partly in fee simple the entire land and partly the mineral rights upon four of the orig- 

 inal lots of the town of Lyman, and therefore supposed to contain 1200 acres. The 

 course of the veins is more than three miles in length, reaching from the Titus farm 

 upon the south to an unoccupied tract called on our map the Penhallow lot. J. H. 

 Paddock, Esq., of St. Johnsbury, Vt., is the principal proprietor, and the manager of 

 the mine and mill. He has brought together several of the tracts known ten years ago 

 as the Oro, Osgood, Osborn, New Hampshire Silver Lead Co., etc. What were form- 

 erly the Oro and Osgood openings are now the No. i and No. 2 shafts of the Paddock 

 mine. Concerning these two mines, I wrote as follows in 1869: 



" The next is called the Osgood mine, embracing about 700 acres of the land on the 

 east slope of Gardner's mountain. I examined four or five openings. The first, near 

 the south line, was ten feet deep, exhibiting five feet width of copper schists. The 

 second shows a width of ten feet of copper schists. The third is a shaft thirty-five 

 feet deep. Eighty feet below is a short tunnel eighty feet long, and designed to cut 

 the vein. A large pile of good specimens of this copper may be seen near the shaft. 



" The next north is the Oro mine. Here is a shaft sixty-five feet deep, a shaft 

 house, easily seen from a great distance on account of its conspicuous position, two 

 drifts fourteen and sixteen feet long, and a vein from four to seven feet wide, carrying 

 more ore near the hanging than the foot wall. Sixty tons, part yielding 10.80, and 

 part 9.-}- per cent, of copper, have been shipped from the mine to Boston. There are 

 one hundred and seventy-five acres of land connected with this property, and the vein 

 is eighty-eight rods long." 



I have visited the No. i shaft several times during the past nine years, watching with 

 interest the progress indicated. Work has not been done continuously. It may be suffi- 

 cient to mention the present [April, 1878] aspect of the excavation. All the laborers 

 have been transferred to the No. i shaft for the purpose of developing that one more 

 rapidly than if two were being exploited at the same time. Seven miners are at work 

 under the superintendence of Capt. Francis Bennett, recently of the copper mines about 

 Lenoxville, P. Q. The depth of the shaft is 170 feet. It follows the vein very nearly 

 in its course. Extensive levels are situated at ten and twenty fathoms depth. Ore 

 has been taken from one or both of these for a distance of 80 feet lengthwise of the 

 vein. It has been proved that the vein is continuous for the distance of 80 feet, 

 though not perfectly straight. There are two well-marked bendings exhibited, the 

 arc of the curve pointing easterly, and these were seen to correspond with eastward 

 thrusts of a dolomite band at the surface. These irregularities recall the similar varied 

 courses of the auriferous conglomerate in the east part of the town (see map, page 296, 

 Vol. II), though much less extensive. Without doubt the careful exploitation of 

 Gardner's mountain in years to come will reveal bends and fractures corresponding 



