60 SCHOOL OF MINES LIBRARY. 



HAUSMANN, J. F. L. Reise durch Scandinavien. 



5 vols. 8vo. Gottingen, 1811-1818. 



Ueber den gegenwartigen Zustand und die Wichtigkeit des 



Hannoverschen Harzes. 8vo. 411 pp. Gottingen, 1832. 



Untersuchen fiber die Formen der leblosen Natur. 



8vo. 677 pp. Gottingen, 1834. 

 HAUY. C. Traite de Cristallographie. 



2 vols. 12mo. Paris, 1822. 



Tableau Comparatif des Resultats de la Cristallographie 



et de L Analyse Chimique Relatifment a la Classification des 

 Mineraux. 12mo. 312 pp., plates. Paris, 1809. 



Traite de Mineralogie. 



4 vols. 4to. text; Atlas of plates. Paris, 1801. 



A Letter to Rev. Win. McLain on the Native Iron of Li 

 beria ; transmitting a Chemical Analysis. Vol. VIIL, Pamphlets. 

 Octavo series. 8vo. 5 pp. Washington, 1855. 



HEDLEY, J. The Working and Ventilation of Coal Mines. 



8vo. 128 pp. London, 1851. 



Traite pratique de L Exploitation des Mines de Houille. 



Traduit par Lambert et Modesse. 



8vo. 100pp. Liege, 1853. 



HEDGES, Isaac A. Sorgo, or the Northern Sugar Plant, with an 

 introduction by William Clough. 



12mo. 204 pp. Cincinnati, 1863. 

 HEER, Oswald. Die Urwelt der Schweiz. 



8vo. 622 pp. Zurich, 1865. 



HENKELS, J. F. Pyritologia oder Kieshistorie als des vornemsten 

 Minerals. Mit einem Vorrede von Nutzen des Bergwerks. 



Svo. 904 pp. Leipsig, 1754. 



HELLMAN, A. Die Petrefacten Thuringens nach dem Materiel des 

 Herzogl Naturalien-Kabinets in Gotha. 



4to. 48 pp., XXIV. plates. Cassel, 1866. 

 HENCHLER, E. Die Berg Knappen. 



Folio. 12 pp., LXXIV. plates. Dresden, 1857. 

 HENRY, Joseph. Contributions to Electricity and Galvanism. 

 Vol. I., Pamphlets. Quarto series. 



4to. 15 pp., I. plate. Philadelphia, 1855. 



Contributions to Electricity and Magnetism. Vol. I., Pamphlets. 



Quarto series. 4to. 51 pp. Philadelphia, 1839. 



The Same as above. Vol. L, Pamphlets. Quarto series. 



4to. 35 pp. Philadelphia, 1841. 



William. The Elements of Experimental Chemistry. 



Tenth edition. 2 vols. Svo. London, 1826. 



HENSHAW, H. W. See under Geographical and Geological Explo 

 rations and Surveys West of the One Hundredth Meridian. 



HENVAUX, D. Construction der Walzwerke. Bearbeitet von Dr. 

 Carl Hartmann. 8vo. 73 pp. Leipsig, 1859. 



HENWOOD, W. J. Address before the Royal Institution of Corn 

 wall. Vol. II., Pamphlets. Octavo series. 



8vo. 65 pp. Truro, 1871. 



