At this point there is one engine of 100-horse power and one of 40-horse power, and one compressor having four cylinders of a diameter of 13 inches and 24 inches stroke. The West heading from this shaft was advanced 293 feet, and the East heading 1,042, on the first day of December, 1866. The progress for the year ending November 1, 1866, at the heading at this point was 636.7, being a fraction over 53 feet per month. For the last four months, ending December 1, 1866, the progress was 322.1, being a fraction over 64 feet per month, which exceeds by four feet per month the highest estimate for hand-drilling by the engineers in 1862, and by thirty and one-third feet the estimate of Mr. Latrobe. The progress of the work at this heading during the last six months, making allowance for the influx of water in November, having exceeded the highest estimate for hand-drilling, should be regarded as evidence alike of the skill of the miners and the good management of the engineer and his subordinates. _Table showing the progress at West Shaft, East Heading, from November 1, 1865, to December 1, 1866._ ======================================= DATE. Distance from Progress, shaft, feet. feet. --------------------------------------- Nov. 1, 1865, 367.5 Dec. 1, 1865, 414.4 46.9 Jan. 1, 1866, 459.4 45.0 Feb. 1, 1866, 503.0 43.6 Mar. 1, 1866, 546.5 43.5 April 1, 1866, 584.8 38.3 May 1, 1866, 623.3 38.5 June 1, 1866, 682.1 58.8 July 1, 1866, 746.1 64.0 Aug. 1, 1866, 810.5 64.4 Sept. 1, 1866, 871.4 60.9 Oct. 1, 1866, 945.4 74.0 Nov. 1, 1866, 1,004.2 58.8 Dec. 1, 1866, 1,042.0 37.8 ======================================= The West heading at this shaft was at first driven 6 feet by 11. It has been found advisable to enlarge it to the dimension of 10 feet 6 inches by 15 feet. This work has been performed by contract. The first letting was at the rate of four dollars per cubic yard, the State furnishing the materials used and removing the stone. The contractors at this rate could not pay their expenses. It was raised to six dollars per yard which was found not to pay, and in July the price was advanced to seven dollars and fifty cents. The State pay the men, charging the same to the contractors, and keep their time. Good progress is made and the work is done to the satisfaction of the engineer.