The Encyclopaedia Britannica: A Dictionary of Arts, Sciences and General Literature, Volume 10

acid ancient angle appear augite axis basalt beds carbonic carbonic acid centre century character chemical coal coast cone consists contains crust crystalline crystals deposit distance district earth equator eruption evidence existence feet felspar formations fossils Gaelic Galatia gallic acid galls galvanometer Gaur gelatin gems geological globe gneiss granite Greek heat hornblende igneous igneous rocks important iron islands known lake land latitude lava less lime limestone longitude magnetic mass materials meridian metamorphic miles mineral mountain observed obtained occur ocean organic original orthoclase parallel Paris passing period plane porphyritic portion present pressure produced quartz regions remains rise river rocks Roman round sand sandstone schists Scotland sediment shales side siliceous Silurian sometimes species specific gravity square miles stones strata structure substance surface temperature thick tion town traced upper vapour vertical volcanic voyage whole