Mining Magazine: Devoted to Mines, Mining Operations, Metallurgy & C, Svazek 7

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Strana 184 - That sections numbered sixteen and thirty-six in every township of public lands in said State, and where either of said sections, or any part thereof, has been sold or otherwise disposed of, other lands, equivalent thereto, and as contiguous as may be, shall be granted to said State for the use of schools.
Strana 59 - Although the art of building has been practised from the earliest times, and constant demands have been made, in every age, for the means of determining the best materials, yet the process of ascertaining the strength and durability of stone appears to have received but little definite scientific attention, and the commission, who...
Strana 183 - That the section number sixteen, in every township, and where such section has been sold, granted or disposed of, other lands equivalent thereto and most contiguous to the same, shall be granted to the inhabitants of such township, for the use of schools.
Strana 63 - ... lines of least resistance, and the remaining pressure must be sustained by the central portions around the vertical axis of the cube. After this important fact was clearly determined, lead and all other interposed substances were discarded, and a method devised by which the upper and lower surfaces of the cube could be ground into perfect parellelism.
Strana 64 - That this may be so was clearly established in the experiments with the coarsely crystallized marbles examined by the commission. When these were submitted to a liquid which slightly tinged the stone, the coloration was more intense around the margin of each crystal, indicating a greater amount of absorption in these portions of the surface. The marble which was chosen for the Capitol is a dolomite, or is composed of carbonate of lime and magnesia in nearly atomic proportions. It was analyzed by...
Strana 160 - ... push the skin into it so as to bind the wings closely to the sides. The cotton may be put in loosely, or a body the size of the original made by wrapping with threads. If the bird have long legs and neck, these had better be folded down over the body, and allowed to dry in that position. Economy of space is a great object in keeping skins, and such birds as herons, geese, swans, &c., occupy too much room when outstretched. In some instances, as among the ducks, woodpeckers, &c., the head is so...
Strana 156 - Small seines for catching fishes in small streams. The two ends should be fastened to brails or sticks (hoe-handles answer well), which are taken in the hands of two persons, and the net drawn both up and down stream. Fishes may often be caught by stirring up the gravel or small stones in a stream, and drawing the net rapidly down the current. Bushes or holes along the banks may be inclosed by the nets, and stirred so as to drive out the fishes, which usually lurk in such localities. These nets may...
Strana 460 - ... with me — This is a remarkable fact and one very easy to imitate ; if, through a hollow boring rod, water be sent down into the bore-hole as it is sunk, the water, in coming up again, must bring with it all the drilled particles. On this principle I started to establish a new method of boring. The apparatus is composed of a hollow boring rod, formed of wrought iron tubes screwed end to end : the lower end of the hollow rod is armed with a perforating tool, suited to the character of the strata...
Strana 419 - The elevation of the summit-level is 2,808 feet above the Pacific, and the width of the gap at that point is about two miles ; from this the ground slopes each way very gradually, the grade or descent on the east, for about 28 miles, being on an average 69 feet per mile. On this eastern declivity of the pass, — the side turned...
Strana 61 - ... convinced that the only entirely reliable means of ascertaining the comparative capability of marble to resist the weather, is to study the actual effects of the atmosphere upon it, as exhibited in buildings which for years have been exposed to these influences. Unfortunately, however, in this country, but few opportunities for applying this test are to be found. It is true some analogous information may be derived from the examination of the exposed surfaces of marble in their out-crops at the...

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