 | Titus Fey Cronise - 1868 - 744 strani
...only after many abortive trials and much experience. This problem involves the following cpnditions : 1st. The whole mass of auriferous gravel must be removed,...magnitude with the accuracy required, and for the want of suflicient care or skill in this particular, years of costly labor and anxious expectation were sometimes... | |
 | Titus Fey Cronise - 1868 - 756 strani
...disintegration of the compact conglomerate as a part of the uninterrupted operation of the whole system. 4Ah. The simultaneous saving of gold without interrupting...avenue for reaching the auriferous deposits, but also a sluice-way, through the whole length of which sluice boxes are laid, both to direct the stream and... | |
 | TItus Fey Cronise - 1868 - 736 strani
...are usually six to eight feet in width by seven feet in height, the length varying from a few Imndred feet to a mile. For driving some of the longer of...avenue for reaching the auriferous deposits, but also a sluice-way, through the whole length of which sluice boxes are laid, both to direct the stream and... | |
 | Titus Fey Cronise - 1868 - 726 strani
...of these works from five to seven years have been required, at a cost of from ten to sixty dollai's per lineal foot, varying with the cost of labor and...avenue for reaching the auriferous deposits, but also a sluice-way, through the whole length of which sluice boxes are laid, both to direct the stream and... | |
 | George Alfred Lawrence - 1873 - 310 strani
...channel, at a point where a shaft or incline is sunk through the gravel until it intersects the tunnel. It obviously demands careful engineering to carry...care or skill in this particular, years of costly labour and anxious expectation were wasted in the early history of these enterprises. The object of... | |
 | George Alfred Lawrence - 1873 - 316 strani
...channel, at a point where a shaft or incline is sunk through the gravel until it intersects the tunnel. It obviously demands careful engineering to carry...care or skill in this particular, years of costly labour and anxious expectation were wasted in the early history of these enterprises. The object of... | |
 | United States. Department of the Treasury - 1874 - 622 strani
...channel, at a point where a shaft or incline is sunk through the gravel until it intersects the tunnel. It obviously demands careful engineering to carry...required, and, for the want of sufficient care or skill iu this particular, years of costly labor and anxious expectation have been wasted in the early history... | |
 | United States. Congress. House - 1874 - 1224 strani
...I. at a point where a shaft or incline is sunk through the gravel until it intersects tho • mnel. It obviously demands careful engineering to carry...accuracy required, and, for the want of sufficient caro or skill in this particular, years of costly labor and anxious expectation have been wasted in... | |
 | 1865 - 846 strani
...at a point where a shaft is sunk through the gravel and 'bed rock' until it intersects the tunnel. It obviously demands careful engineering to carry...costly labor and anxious expectation were sometimes wasted in the early history of these enterprises. The object of this laborious exploration is obvious.... | |
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... per lineal foot, varying with the cost of labor and the character of the rock to be excavated. The end of the tunnel is designed to be from fifty to one hundred feet, or perhaps more, beneath the bottom of the gravel, at a point where a shaft or incline... 