The American Journal of Science, Volume 45; Volume 195

aggregates amount angle appears Arisaig axis basal beds calcite carbonate cavities Chem chemical chert cm³ coal composition coral cordierite Cretaceous cristobalite crystalline crystals curves Cuttingsville cylinder deposits described dikes dilute dolomite equations eruptive essexite etch evidence fauna feet feldspar field figures fluoride formation fossils Funafuti Geol Geological glacial Granite Hill Hermit trail hornblende hydrolysis hypophosphoric acid ilvaite indicate iodine limestone lower magnesite marine measured melting temperatures method MgO.SiO mineral Moraine Moss Creek nordmarkite observed obtained occur origin Patagonian phase phosphorous acid plane precipitate present pressure prism pulaskite quartz Quenchings which determine quintuple point Redwall region rhombohedron Roca rock San Jorge sandstones SCI.-FOURTH SERIES sediments shales silica Silurian SiO2 solution spark species specimen spinel strata Supai surface syenite TABLE ternary compound Tertiary thick thorium thorium nitrate tion tube Upper valley West Sixmile zone