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2 vols. 8vo. Berlin, 1869. 



Erganzunsband zum Leitfaden der Bergbaukunde. 



8vo. Berlin, 1872. 



H. Leitfaden zur Bergbaukunde. Edited by Dr. A. Serlo. 



8vo. 444 pp. Berlin, 1873. 



Low. On the Chemical Equivalents of Certain Bodies, and on the 

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Octavo series. 8vo. 20pp. 1854. 



LUBBOCK, John. The Origin of Civilization, and the Primitive 



Condition of Man. 12mo. 380pp. New- York, 1874. 



LTJBSEN, H. B. Ausfuhrliches Lerhbuch der Analysis. 



8vo. 178pp. &quot;Hamburg, 1853. 



Ausfuhrliches Lerhbuch der Hohre Geometric. 



8vo. 214 pp. Leipsig, 1855. 



Ausfuhrliches Lerhbuch der Arithmetik und Algebra. 



8vo. 254 pp. Hamburg, 1853. 



Einleitung in die Infinitessimal Rechnung. 



8vo. 183 pp. Hamburg, 1855. 

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besonderer Rucksicht auf den gegenwartigen Standpunkt 



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2 vols. 8vo. Bremen, 1868. 

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LUDWIG, Rudolph A. B. S. Ueber das rheinische Schiefergebirge. 



Vol. II., Pamphlets. Octavo series. 12lHO. 40 pp., I. map. 1853. 



LUNDGREN, B. Pala3ontologiska lakttagelser otber Faxekalken pa 



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LUNGE, George. Die Destination des Steinkohlentheers und der 

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LYELL, Sir Charles. Elements of Geology. 



&quot; 2 vols. 12mo. Boston, 1841. 



Principles of Geology. 3 vols. 12rno. Boston, 1842. 



The same as above. 8vo. 834 pp. New- York, 1865. 



The same as above. Vol. I. 



8vo. 671pp. New- York, 1872. 



The Geological Evidences of the Antiquity of Man, with an 



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8vo. 573 pp. London, 1873. 



LTMAN, B. S. A Report on the Bourinot Coal Claims and Land, 

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Scientific Education in its Relations to Industry. An Ad 

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8vo. 30 pp. New-Haven, 1867. 



The Topography of the Punjaub Oil Regions. 4to. 14 pp. 



