On the Building and Ornamental Stones of WisconsinState, 1898 - 544 頁 |
常見字詞
abundant alternate freezing Amberg amount Average number Bass Island beds biotite brownstone building stone BULLETIN calcium carbonate carbonate cement Chapter VIII chemical clay pockets Co.'s quarry color considerable construction crushing strength crystalline cubic foot cutting and dressing depth disintegration Dunnville Facilities at hand feet feldspar formation freezing and thawing furnish grains Granite Co.'s gray hand derricks hand for quarrying HIST Huronian igneous rocks iron oxide irregular jointing planes laboratory Lake Superior limestone located macadam mainly Merkle Granite Microscopical miles Milwaukee minerals Montello granite monumental mounds number of employees obtained occurs opening operated outcrops paid different classes Pike River Plate polished pore space porosity porphyritic quartz quartzite rhyolite river rubble samples sedimentary shows specific gravity Statistical Data surface Table temperature tests texture thickness tion Wages paid different walls Waushara county weathering weight WISCONSIN GEOL
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第 65 頁 - the dry and saturated weights obtained for the samples used in computing the specific gravity, were used. The difference in these weights was multiplied by the specific gravity of the rock. This amount was added to the dry weight, giving the sum. The difference of the dry and saturated weights multiplied by the
第 371 頁 - merely in the percentage of such elements. The two series of minerals are known by the name of their most common member, as orthoclase and plagioclase. Orthoclase is composed of an admixture of potassium, aluminum, silicon, and oxygen, with occasionally a small percentage of sodium, (K, Na) 2 A1 2 Si 6 O,
第 58 頁 - is generally expressed in pounds per square inch. It is "valuable in determining the effect of combining masonry and metal, of joining different kinds of masonry, or of joining new masonry to old; in calculating the effect of loading a masonry arch; in proportioning abutments and piers of railroad bridges subject to shock, etc.
第 372 頁 - to the above named elements, magnesium and iron. The hardness of muscovite is 2-2.5, while that of biotite is 2.5-3. Mica is distinguished from other associated minerals by its easy and close cleavage. It has the appearance of being composed of very many exceedingly thin, glossy sheets, piled one upon another.
第 369 頁 - (7) quartz; (8) topaz; (9) sapphire; and (10) diamond. The hardness of any mineral is determined by its ability to scratch the members of this scale. The degree of hardness is expressed by the number of the mineral in the scale, and minerals of intermediate hardness are expressed by fractions.
第 63 頁 - When reckoned in per cent., the error would be such a small fraction of 1 per cent, as not to be worthy of attention. The specific gravity was determined by dividing the average of the two dry weights by the difference between the average dry weight and the weight of the cube suspended in water. The
第 377 頁 - O). It is found in all kinds of rocks—eruptive, sedimentary, and metamorphic. It results mainly from the decomposition of other minerals rich in iron. As a staining or coloring agent, it is probably more abundant than red hematite. It also occurs in large masses, and
第 399 頁 - as a capacity present in some rocks to break in certain directions more easily than in others." Fissility is "defined as a structure in some rocks, by virtue of which
第 371 頁 - feldspar group contains two series of minerals, under both of which are included several species and sub-species. Certain of the species differ in the elements which enter into their composition, while others differ merely in the percentage of such elements. The two series of minerals are
第 58 頁 - Modulus of Elasticity — The modulus of elasticity is synonymous with coefficient of elasticity, and is sometimes defined as the weight that would be required to stretch a rod one square inch in section to double its length.