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20 feet air plug drills allanite apatite Bethel biotite black mica biotite granite bleached biotite bluish bluish-gray shade briquets calcite carbon cavities in sheets cent chlorite cold dilute muriatic constituents cubic feet descending order dikes dilute muriatic acid Dummerston east effervesces with cold epidote feet in depth feet thick fired fuel bed furnace gases grain as horizontal granite specimen heat hoisting engine hydrocarbons inch and mica inches thick inclining to medium kaolinized large rock drills light Barre little muscovite locomotive magnetite microcline miles milk-white soda-lime feldspar Millstone Hill monuments muriatic acid muscovite muscovite or bleached oligoclase oligoclase-albite order of abundance orthoclase particles pegmatite polished porphyritic pounds pyrite quarry quartz monzonite rate of combustion reported as vertical rift is reported Robeson Mountain rutile schist sets of joints side smoky quartz South Ryegate spaced stack striking surface temperature tests titanite Vermont white mica XXIX zircon zoisite
Seite 16 - It is sometimes convenient to have an elaborate statement of fact summarized into a few representative figures, the relation between which may be easily apprehended. Such a summary may be framed for the present case by assuming that the normal maximum power of the locomotive tested is that which involves a rate of evaporation of 12 pounds of water per square foot of heating surface per hour, and by averaging from the diagrams (Figs.
Seite 131 - Light whose vibrations, unlike those of ordinary light, which are in all directions, are in only one plane. Polarized light is used in the microscopic study of rocks.
Seite 131 - OPHITIC. A term applied to microscopic rock texture to designate a mass of longish interlacing crystals, the spaces between which have been filled with minerals of later crystallization.
Seite 130 - DIKE. A mass of granite, diabase, basalt, or other rock which has been erupted through a narrow fissure. DIMENSION STONE. A term applied to stones that are quarried of required dimensions. DIP. The inclination from the horizon, given In terms of degrees, of a sheet, joint, heading, dike, or other structural plane In a rock. DRIFT. Sand and bowlders deiwsited by the continental glacier.
Seite 32 - ... to 0.1 inch. Its constituents, in descending order of abundance, are : Light smoky quartz with hairlike crystals of rutile, and sheets of cavities with cracks parallel to them; milk-white soda-lime feldspar (oligoclase) much kaolinized and micacized, with some carbonate and epidote, and in places intergrown with quartz in vermicular structure; clear to scarcely bluish potash feldspar (microcline with inclusions of oligoclase, quartz, and mica, also orthoclase micacized) ; biotite (black mica)...
Seite 28 - Experimental work conducted in the chemical laboratory of the United States fuel-testing plant at St. Louis, Mo., January 1, 1905, to July 31, 1906, by NW Lord.
Seite 130 - QUARRY. One in which the joints are either so close or so irregular that no very large blocks of stone can be quarried. CHANNEL. A narrow artificial incision across a mass of rock, which, in the case of a granite sheet, is made either by a series of contiguous drill holes or by blasting a series of holes arranged in zigzag order.