. The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world. 1. AiiiiKMi-imis i(.\ rifuriiiis. 2. with tfiHlrils. 3. rijeccliiiius (•le;raiis. 4. ClKinetos ;. fjoniiirps .Idssrp. •. Cycloi)!!!!!.!!:!!!!!!.; : liosiili- it is the wiiiir-shinlh «{ :i !•. ; !in. slnt\viii-r the stis-in??l of Ihf AlftopttTis Si>heiii>[.itM-is l.,i. FOSSILS OF THE 1. The Tooth-Fern
. The Americana; a universal reference library, comprising the arts and sciences, literature, history, biography, geography, commerce, etc., of the world. 1. AiiiiKMi-imis i(.\ rifuriiiis. 2. with tfiHlrils. 3. rijeccliiiius (•le;raiis. 4. ClKinetos ;. fjoniiirps .Idssrp. •. Cycloi)!!!!!.!!:!!!!!!.; : liosiili- it is the wiiiir-shinlh «{ :i !•. ; !in. slnt\viii-r the stis-in??l of Ihf AlftopttTis Si>heiii>[.itM-is l.,i. FOSSILS OF THE 1. The Tooth-Fern —Odontopteris. 2. The Scale Tree — Lepidodeiulrou. 3. Cordaites Borassifolia. 4. Pecopteris Cyathea. 5. Calamltt-s. 6. Sigillaria. 7. Rhizome of Sigillaria in Water. 8. Foliation of Aunularia. CARBORUNDUM —CAR BUILDING INDUSTRY Carboniferous rocks are sandstones and slates,while in Russia the coal measures of LowerCarboniferous age are overlaid by a great thick-ness of Upper Carboniferous limestone. InAsia the Chinese coal measures are of UpperCarboniferous age, and are underlaid by LowerCarboniferous limestone. In South Americathe Lower Carboniferous is mostly made up ofsandstones, and the Upper of limestones, withvery few coal seams. See Dana. ^Manual of Geology ; Giekie, TextBook of Geology ; Report of the United StatesGeological Survey (1900-01, Part III.). Carborundum, a trade name for carbide ofsilicon, SiC. This compound is produced byheating sand and carbon together in the electricfurnace. It is characterized by extreme hard-ness, and is used for abrasi
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectencyclo, bookyear1908
