... is washed these are considered preferable on account of their cheapness. At Smartsville they have been found to serve fully as well as the blocks, and are claimed to be cheaper. It must, however, be stated that they are more costly to handle, as longer... A Practical Treatise on Hydraulic Mining in California - Stran 226avtor: Augustus Jesse Bowie (Jr.) - 1885 - 307 straniCelotni ogled - O knjigi
| Augustus Jesse Bowie - 1878 - 108 strani
...found to serve fully as well as the blocks, and are claimed to be cheaper. It must, however, be stated that they are more costly to handle, as longer time is required to clean up and repave the sluices when they are used. In some sections of the State longitudinal riffles are preferred, ie, riffles made... | |
| American Institute of Mining, Metallurgical, and Petroleum Engineers, American Institute of Mining Engineers - 1879 - 688 strani
...found to serve fully as well, as the blocks, and are claimed to be cheaper. It must, however, be stated that they are more costly to handle, as longer time is required to clean up and repave the sluices when they are used. In some sections of the State longitudinal riffles are preferred, ie, riffles made... | |
| California. Legislature - 1883 - 497 strani
...found to serve fully as well as the blocks, and are claimed to be cheaper. It must, however, be stated that they are more costly to handle, as longer time is required to clean up and repave the sluices when they are used. In some sections of the State longitudinal riffles, are preferred, ie, riffles... | |
| Augustus Jesse Bowie (Jr) - 1885 - 352 strani
...is placed up-stream. As the blocks do not fill the whole width of the sluice, the alternate rows arc fitted so as to break joints. Rock Riffles. — In...Sweetland, Nevada County, costs about $10 per box (14feet long and 5 feet wide). Blocks and Rocks. — A system of riffles consisting of a row of blocks... | |
| Augustus Jesse Bowie - 1885 - 364 strani
...whole width of the sluice, the alternate rows are fitted so as to break joints. Rock Riffles.—In many localities stones instead of blocks are used...about $10 per box (14 feet long and 5 feet wide). of the blocks, and has given excellent results. The blockand-rock riffles are not desirable for those... | |
| 1882 - 532 strani
...found to serve fully as well as the blocks, and are claimed to be eheaper. It must, however, be stated that they are more costly to handle, as longer time is required to clean up and repave the sluices when they are used. In some sections of the State longitudinal riffles are preferred, te, riffles made... | |
| California, California. Legislature - 1883 - 994 strani
...found to serve fully as well as the blocks, and are claimed to be cheaper. It must, however, be stated that they are more costly to handle, as longer time is required to clean up and repave the sluices when they are used, in some sections of the State longitudinal riffles are preferred, \. e., riffles... | |
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