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MONTGOMERY SCHUYLER, N. Y. City; Author of Studies in American Architecture, 1892.

ASTROLOGY-ASTRONOMY-NAVIGATION

CHARLES LEANDER DOOLITTLE, C. E.; Professor of Mathematics, Flower Professor of Astronomy and Director of the Flower Observatory, University of Pennsylvania, Philadelphia, Pa. Author of Treatise on Practical Astronomy, as applied to Geodesy and Navigation, 1890.

BIOLOGY

PROF. JULIUS NELSON.

BOTANY

NATHANIEL LORD BRITTON, Ph.D.; Emeritus Professor of Botany, Columbia University, New York City, and Director of the New York Botanical Garden. Author, with Addison Brown, of An Illustrated Flora of the Northern United States, Canada and the British Possessions, 3 vols., 1896-97.

BRIDGES

PROF. MANSFIELD MERRIMAN, Ph.D.

CANALS

PROF. MANSFIELD MERRIMAN, Ph.D.

CERAMICS

PROF. WM. H. CHANDLER, Ph.D.

CHEMISTRY, ORGANIC

LEWIS MILLS NORTON, Ph.D.; Professor of Organic and Industrial Chemistry in Massachusetts Institute of Technology, Boston, Mass., 1883-93. Author of Chemical Synonyms. PROF. Wм. H. CHANDLER, Ph.D.

CHEMISTRY, INORGANIC

WILLIAM BUSH SCHOBER, Ph.D.; Instructor in Organic Chemistry and Chemical Philosophy, Lehigh University, South Bethlehem, Pa.

PROF. WM. H. CHANDLER, Ph.D.

CHEMICAL TECHNOLOGY

FREDERICK WILLIAM SPANUTIUS, M.S.; Instructor in Qualitative Analysis, Industrial Chemistry and Assaying in the Lehigh University, South Bethlehem, Pa.

PROF. WM. H. CHANDLER, Ph.D.

CIVIL ENGINEERING

MANSFIELD MERRIMAN, Ph.D.; Professor of Civil Engineering in the Lehigh University, South Bethlehem, Pa. Author of Bridges, 1876; Least Squares, 1877; Roofs and Bridges, 1888; Hydraulics, 1889; Geodetic Surveying, 1893; Retaining Walls and Masonry Dams, 1893.

CLASSICAL AND ORIENTAL LITERATURE AND BIOGRAPHY EDMUND MORRIS HYDE, Ph.D.; Professor of Latin, Lehigh University, South Bethlehem, Pa.

COMMERCE

PROF. WM. H. CHANDLER, Ph.D.

CUSTOMS-MANNERS-GAMES-MAGIC

STEWART CULIN, Philadelphia, Pa.; Director of the Museums of Archæology and Paleontology, University of Pennsylvania. Author of Religious Ceremonies of the Chinese in the

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Eastern Cities of the United States, 1887; Chinese in America, 1887; Gambling Games of the Chinese in America, 1891; Korean Games, 1895.

PROF. Wм. H. CHANDLER, Ph.D.

ECONOMICS-ETHICS

EDWARD POTTS CHEYNEY, Professor of European History, University of Pennsylvania, Philadelphia, Pa. Author of Third Revolution, 1892; Medieval Manor, 1894.

ALBERT S. BOLLES, Philadelphia, Pa.; Lecturer on Banking, University of Pennsylvania, Philadelphia. Author of Financial History of the United States, and Practical Banking.

EDUCATION

PROF. Wм. H. CHANDLER, Ph.D.

ELECTRICITY-PHYSICS

GEORGE FREDERICK BARKER, D.Sc.; Professor of Physics, University of Pennsylvania, Philadelphia, Pa. Author of Text-Book of Elementary Chemistry, 1870; Physics, 1893. ARTHUR WILLIS GOODSPEED, Ph.D.; Assistant Professor of Physics, University of Pennsylvania, Philadelphia, Pa.

ENGRAVING-ENGRAVERS

ANDREW VARICK STOUT ANTHONY, New York; American Artist and Engraver, especially successful in engraving. His illustrations of Whittier's Snow Bound, 1867; Longfellow's Skeleton in Armor, 1877; and Hawthorne's Scarlet Letter, 1878, are well known. WILLIAM JAMES LINTON, New Haven, Conn.; Member of the National Academy of Design; Anglo-American Wood Engraver, Poet and Prose Writer. Author of Wood Engraving, 1879-87; Masters of Wood Engraving, 1892; Claribel and other Poems, 1865; LoveLore, 1887; Life of John Greenleaf Whittier, 1893.

ETHICS

PROF. E. P. CHEYNEY.

ETHNOLOGY

PROF. JULIUS NELSON.

EXPLOSIVES

PETER SMITH MICHIE, LL.D.; Colonel U. S. Army and Professor of Natural and Experimental Philosophy, United States Military Academy, West Point, N. Y. Author of Elements of Wave-Motion, relating to Sound and Light, 1882; Life and Letters of Gen. Upton, 1885; Personnel of Seacoast Defense, 1887; Elements of Analytical Mechanics, 1887; Elements of Hydro-Mechanics, 1888; Practical Astronomy, 1893.

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GEOGRAPHY, POLITICAL-GEOGRAPHY, PHYSICAL

HENRY GANNETT, Geographer; Chief Topographer of U. S. Geological Survey, Washington, D.C. Author of Dictionary of Altitudes, 1891; Manual of Topographic Surveying; Sta

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tistics of the Negroes in the United States, 1894; Occupations of the Negroes, 1895; Building of a Nation; Growth, Present Condition and Resources of the United States, with Forecast of the Future, 1895.

GEOLOGY-PALEONTOLOGY

EDWARD WALLER CLAY POLE, D.Sc., F.G.S.; Professor of Natural Science, Buchtel College, Akron, Ohio. Paleontologist to the Second Geological Survey of Pennsylvania. Author of Lake Age in Ohio, 1888.

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HISTORY AND BIOGRAPHY-ANCIENT AND MODERN MYTHOLOGY

JOHN ELLSWORTH GOODRICH, A.M.; Professor of Latin in the University of Vermont, Burlington, Vt.

HYGIENE

Wм. L. ESTES, M.D. A. L. KOTZ, M.D.

CHARLES MCINTIRE, M.D.

HYMNOLOGY—NUMISMATICS-PHILATELY

FREDERICK MAYER BIRD, South Bethlehem, Pa.; he has written extensively on Hymnology; with Rev. B. M. Smucker, D.D., he revised The Lutherium Ministerium Hymns, 1868. Editor of Lippincott's Magazine.

INORGANIC CHEMISTRY

WILLIAM B. SHOBER, Ph.D.

JURISPRUDENCE-LEGAL BIOGRAPHY

FRANCIS M. BURDICK, LL.B.; Dwight Professor of Law, Columbia University, New York City, and Author of Study of Law as a Part of a General Education, 1887; Direct Taxes, 1889; Cases on Torts, 1891; Law of Sales of Personal Property, 1897.

LIGHT

PROF. GEORGE F. BARKER, D.Sc.

PROF. A. W. GOODSPEED, Ph.D.

LITERATURE, CLASSICAL AND ORIENTAL

PROF. EDMUND M. HYDE, Ph.D.

LITERATURE, EUROPEAN AND AMERICAN

JAMES ORMSBEE MURRAY, D.D., LL.D.; Holmes Professor of Belles Lettres and the English Language and Letters, Princeton University, Princeton, N. J. Author of Life of Francis Wayland, 1891.

MACHINES--MECHANICAL ENGINEERING

FREDERICK REMSEN HUTTON, E. M., Ph.D.; Professor of Mechanical Engineering, Columbia University, New York City; Secretary of the American Society of Mechanical Engineers. Author of The Mechanical Engineering of Power Plants, 1897.

MAGIC

STEWART CULIN.

MAGNETISM

PROF. GEORGE F. BARKER, D.Sc.

PROF. A. W. GOODSPEED, Ph.D.

CONTRIBUTORS

MANNERS

STEWART CULIN.

MANUFACTURES

PROF. WM. H. CHANDLER, Ph.D.

MATHEMATICS

OREN ROOT, D.D., L.H.D.; Pratt Professor of Mathematics, Hamilton College, Clinton, N. Y.; previously Professor in the State University of Missouri, 1866-71, and President of Pritchett College, in Missouri, 1871-80.

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JOSEPH WILLIAM RICHARDS, Ph.D.; Assistant Professor of Metallurgy, Mineralogy and Blowpiping, Lehigh University, South Bethlehem, Pa. Author of Aluminium, its Properties, Metallurgy and Alloys, 1887.

METEOROLOGY

CLEVELAND ABBE, Ph.D., LL.D.; Astronomer and Meteorologist, Professor of Meteorology in the United States Weather Bureau at Washington, D. C., and deviser of the present system of Standard Time. Editor of The Monthly Weather Review.

MILITARY SCIENCE-ORDNANCE-SMALL ARMS-EXPLOSIVES
PROF. P. S. MICHIE, U.S.A.

MINERALOGY-MINING ENGINEERING

WILLIAM HENRY PETTEE, A.M.; Professor of Mineralogy, Economic Geology and Mining Engineering, University of Michigan, Ann Arbor, Mich. Assistant on the Geological Survey of California 1870-71. Author of Contributions to Barometric Hypsometry, 1874.

MUSIC-COMPOSERS-MUSICIANS

HENRY EDWARD KREHBIEL, New York City; Musical Critic of the N. Y. Tribune. Author of Technics of Violin Playing, 1880; Studies in the Wagnerian Drama, 1891.

MYTHOLOGY

PROF. Wм. H. GOODRICH.

NAVAL ENGINEERING

WILLIAM H. JAQUES, U.S.N.; Secretary of Sub-committee of U. S. Senate on Ordnance and Warships 1885. Author of Ericsson's Destroyer and Submarine Gun, 1885; Heavy Ordnance for National Defense, 1885; Modern Armor for National Defense, 1886; Torpedoes for National Defense, 1886.

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WILLIAM HENRY GOODYEAR, A.M., New York City; Lecturer on Art and Archæology in the Brooklyn Institute of Arts and Sciences. Author of History of Art, 1887; Grammar of the Lotus, 1891; Roman and Medieval Art, 1893; Renaissance and Modern Art, 1894.

PALEONTOLOGY

PROF. E. W. CLAYPOLE.

PALMISTRY

STEWART CULIN.

PHILATELY

PROF. FREDERICK M. BIRD, D.D.

PHILOLOGY

FRANCIS BARTON GUMMERE, Ph.D.; Professor of English and German Languages, Haverford College, Pa. Author of Handbook of Poetics, 1885; Germanic Origins, 1892; Old English Ballads, 1894; The Merchant of Venice, 1896.

PHILOSOPHY

JAMES HERVEY HYSLOP, Ph.D.; Professor of Logic and Ethics, Columbia University, New York City. Author of Elements of Logic, 1893; Ethics of Hume, 1893; Elements of Ethics, 1894.

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