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ACKNOWLEDGMENTS.
871
    • Geology of Baltimore and Vicinity.Part I. Crystalline Rocks.77-124 pp., 1 map.Part II. Sedimentary Rocks (by N. H. Darton).125-139 pp., 1 map.—Extr. Guide Book of Balt., Feb., 1892.
    • Modern Petrography.35 pp.
    • Geological and Petrographical Observations in Southern and Western Norway.551-553 pp.—Bull. Geol. Soc. Am., Vol. I.
    • Notes on the Eruptive Origin of the Syracuse Serpentine.533-534 pp.—Bull. Geol. Soc. Am., Vol. I.
    • The Nickel and Copper Deposits of Sudbury District, Canada (by Robert Bell).125-137 pp.—Bull. Geol. Soc. Am., Vol. II.
    • On the Serpentine of Syracuse, N. Y.232-233 pp.—Sci., Vol. IX, No. 214, March 11, 1887.
    • The Microscope and the Study of the Crystalline Schists.2 pp.—Sci., Vol. XXI, No. 518, Jan. 6, 1893.
    • On a Geological Excursion in the Northern Appalachian Chain.27-28 pp.—Johns Hopkins Univ. Cir., Vol. X, No. 84.
    • Maps of the Territory included within the State of Maryland, especially the vicinity of Baltimore.37-45 pp.—Johns Hopkins Univ. Cir., Vol. XII, No. 103.
  • Winslow, Arthur.
    • The Geology and Mineral Products of Missouri.14 pp., Ill.

(Further acknowledgments of pamphlets already received will be made in the next number.)