 | | Report (issue) | | DESCRIPTIVE MINERALOGY OF PENNSYLVANIA 104 Na 2Al 2 Si3 Oi .2H 2 O; SiO 2 47.4, A1 2 O 3 26.8, Na...Na 2 O 16.3, Lenni, Delaware County. Crystals. Eyerman, 1911, 11. Composition: Analysis: Fe 2 O3 CaO...Sp.gr LOCALITIES: Berks County: Birdsboro, and Gickerville; Delaware County: Leiperville, Lenni (druses...Felton's farm (Chester), and Ward's quarry; Montgomery County: Sumneytown, and Perkiomenville ; Philadelphia:...Birdsboro), Berks County. White, Smith, 1910, 540. silky mass of radiating needles, with calcite. Colorless |  | | Journal (issue) | | WILLIAM L. AFFELDER, THE School of Mines of the Pennsylvania State College, having received many inquiries...unable to find, either in the Reports of the Pennsylvania Geological Survey or any other literature, satisfactory...Hummelstown , Lumberville , Cromwell. XVII. Permian Rock - Fish Cr. Sandstone, Washington Co. XVI. Upper...Waynesburg ; Great Lime stone , Coal Centre. XIV. Lower Barren Measure, Crinoidal Limestones, Sheridan ;...Sandstones, Morgantown and Connellsville. XIII. Lower Productive Coal Measure Sandstones, Limestones, |  | | Book (edition) | | Investigation of Rocka 434 436 447 TABLE OF CONTENTS. Rock 4. Microscopic Characteristics of 5. Descriptions...scale to soapstone at the other. There is a still lower limit in liquids and gases; but of the hardness...the planes of the trisoctahedron in Fig. 21. The lower one of the three on the upper front solid angle...by a constant ratio, and the expression for the lower right one of the six planes will be 3c f & la. By...often attached by one extremity to the supporting rock and have perfect terminating planes only at the |  | | Book (edition) | | scale to soapstone at the other. There is a still lower limit in liipihls and gases ; hut of the hardness...are the planes of the trisoctabedron in fig. 21. lower one of the three on the upper front solid angle...by a constant ratio, and the expression for the lower right one of the six la. By a little study, the...one extremity to the support1. right angles ing rock and have perfect terminating planes only at the...being here directly over those suppressed in the lower pyramid. If the student will shade over half the |  | | Book (edition) | | identical substance with calcium carbonate, or calcite, found in the rocks, and in each case is evolved...geology, the department which considers of the earth's rock formations. has especially the associations of species...like cleavage will be constant thus, a mass of calcite under the blow of a hammer will separate into countless...occuring planes pertain equally to both the upper and lower (or opposite) ranges of sectants, as in all ordinary...which the planes pertain to either the upper or the lower range, and not to both, and hence the planes are |  | | Book (edition) | | 8vo, cloth, INSTRUCTIONS FOR THE DETERMINATION OF ROCK-FORMING MINERALS. HUSSAK. SMITH. By 3 50 Eugen...—Mirdtu/ Record. 4 00 EXPLOSIVE COMPOUNDS AND ROCK DRILLS. DRINKER. Giving properties of Modern Explosives...of Blastand descriptions and uses of the various Rock Drills and Compressors, and forming a SUPPLEMENTARY...identical substance with calcium carbonate, or calcite, found in the rocks, and in each case is evolved...geology, the department which considers of the earth's rock formations. especially the associations of species |  | | Book (edition) | | identical substance with calcium carbonate, or calcite, fouud There is hence nothing in the rocks, and...geology, the department which considers of the earth's rock formations. especially the associations of species...like cleavage will be constant thus, a mass of calcite under the blow of a hammer will separate into countless...occuring planes pertain equally to both the upper and lower (or opposite) ranges of sectants, as in all ordinary...which the planes pertain to either the upper or the lower range, and not to both, and hence the planes are |
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