503. Hall, Jas. Paleontology of New York. Vols. 1 To 4, Inclusive, bound in 5. 4to, original binding, fine condition. Hundreds of lithog. plates of fossils. These earlier vols. are rare. Albany, 1847.$6.50
504. Hamilton, Sir W. Observations on Mt. Vesuvius, Mt. Etna, and other Volcanos. To which are added Explanatory Notes by the Author. 179 pp., 12mo, calf, 5 plates and map. London, 1774.$1.75
505. Hawkins, Thos. The Book of the Great Sea Dragons, Ichthyosauri and Plesiosauri, Gedolim Taninim of Moses. Extinct Monsters of the Ancient Earth. 27 pp., 30 plates, folio, half roan. London, 1840.$5.00
506. Heilprin, A. Town Geology, the Lesson of the Philadelphia Rocks. 7 plates, 2 of maps, rare. Phila., 1885.$1.25
506A. Heilprin’s West Florida. See Travels.
507. Hill, J. Fossils Arranged According to their Obvious Characters, with their History and Descriptions, under the Articles of Form, Hardness, Color, etc. Calf, cracked. The author uses a binomial system like the Linnæan. London, 1771.$1.50
508. Hitchcock, Edw. Ichnology of New England. A Report on the Sandstone of the Connecticut Valley, especially its Fossil Footmarks, made to the Governor of Mass. 4to, 60 plates. Boston, 1858.$2.00
509. Hitchcock and Deane’s Monographs on Fossil Footmarks in the U. S., especially in Connecticut. Illus. by 31 folding plates of same. Extracted from Memoirs of Amer. Acad. of Arts and Sci. Large 4to, uncut, paper, with title, 2 papers. Boston, 1848-49.$2.00
510. Humboldt, Alexander Von. Kosmos Entwurf Einer Plusischen Weltbeschreibung. 4 vols., 8vo, text and folio atlas, 5 vols. complete. Fine copy, half mor., colored plates. First ed. of this great classic, very rare. With autograph letter (A. L. S.) from the author to Baron von Bulow, of Berlin, laid in vol. 1. Stuttgart und Tubingen, 1845-58.$8.50
511. Instituto Geologico de Mexico, Boletin del Nos. 12 to 16, Inclus. 5 complete Nos., folio, illus., folding maps. Mexico, 1899-1902. The lot,$2.75