The American Journal of Science, Volume 4; Volume 204

ammonium chloride appears aragonite atoms bands barium basalt Basin beds biotite bowlders brachiopods calcite canine cent chemical chloride clay colloidal color composition compound cone cone-in-cone Cope crystalline crystals cubic davisi deposits described determined Devonian diameter Dinictis Eocene evidence fanglomerates fault plane fauna feet feldspar flora formation fossils gabbro genus Geological Glass granite graptolites Holotype Hyrachyus igneous indices John Day Jour lake Laue photographs layer length leucite limestone liquid lode lower Marsh material measurements melting method miles minerals Miocene molar molecules Nimravus Nimravus debilis occur orthoclase oxide Payette Pogonodon posterior present probably quartz quartzite Reagan region ridges rocks salt sandstone SCI.-FIFTH SERIES sediments shales shown silicates skull solution space groups sparagmite species specimens stibnite strontium structure surface symmetry temperature thickness tion Triassic trilobite U. S. Geol upper X-rays zone