The American Journal of Science, Band 235

albite amount diopside angles anhydrite anhydrous autoclave B₂O binary biotite boric acid Bowen cent Chem chemical components composition compound compressibility concentration cristobalite crystalline crystals determined diopside diopside in glass dissociation pressure equation eutectic feldspar filtrate Finland fumarolic furnace gases Geol glass Rare gram granites gypsum H₂O HBO,I HBO2 heat hemihydrate hydrate igneous increase K₂O Kivu lava leucite leucite in glass liquid liquidus magma material measured melting point Merwin metaborate method mica minerals mixture Na₂O NaOH Nephelite Nephelite observed obtained oxide peridotite platinum porphyroblasts potash feldspar present radium rapakivi Rare diopside reaction refractive refractive index relations Rift rocks sample saturated silicate SiO2 sodium sodium tetraborate solid phase solubility solubility curve solution specimen sulphate surface Table temperature ternary tetrathionate tion transition point tridymite tridymite in glass tube ture values vapor pressure volatiles volcano volume