SI 

 •9 



CONTENTS TO VOLUME XLII. 



Niimlber 247. 



Page 

 Art. I. — Discovery of Fossil Human Remains in Florida in 



Association, with Extinct Vertebrates; byE. H. Sellards 1 

 II. — New Cyprinid Fish, Leuciscus rosei, from Miocene of 



British- Columbia; by L. Hussakof 18 



III. — Cycadophyte from the North American Coal Measures; 



by H. Bassler 21 



IV. — The Pleionian Cycle of Climatic Fluctuations; by H. 



Arctowski .- — 27 



V— Geodes of the Keokuk Beds; by F. M. Van Tuyl 34 



VI. — Berea Formation of Ohio and Pennsylvania; by W. A. 



Verwiebe 43 



VII. — On Hydrozincite; by W. E. Ford and W. A. Bradley 59 

 VIII. — Rotation of Interference Fringes in Case of Non- 

 reversed and of Reversed Spectra ; byC. Barus 63 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Qualitative Separation of Tin, Arsenic and Anti- 

 mony, J. M. Welch and H. C. P. Weber: New Method for Estimating 

 Ammonia, G. E. Foxwell: Analytical Chemistry, F. P. Treadwell, 74. — 

 System of Physical Chemistry, W. C. McLewis, 75. — Practical Physio- 

 logical Chemistry, P. B. Hawk: Ionization and Dissociation of Hydrogen, 

 A. J. Dempster, 76. — Structure of Broadened Spectrum Lines, T. E. 

 Merton, 77. — Single-Line Badiation of Magnesium, McLennan, 78. — 

 Treatise on Electricity, F. B. Pidduck: Physical Properties of Colloidal 

 Solutions, E. F. Burton, 79. 



Geology and Natural History — Stratigraphy and fauna of Tejon Eocene of 

 California, E. Dickerson, 80. — New fossil Coleoptera, from Florissant 

 beds, H. F. Wickham : Eocene of the Lower Cowlitz River valley, Wash- 

 ington, etc., C. E. Weaver : Upper Cretaceous floras of the world, E. W. 

 Berry, 81.— Geology and underground water of Luna County, New Mex. , 

 N. H. Darton: Contributions from Walker Museum, Univ. of Chicago: 

 Virginia Geological Survey, University of Virginia, T. L. Watson, 

 82. — The Physical Geography of Wisconsin, L. Martin : Publications of 

 U. S. Bureau of Mines, V. H. Manning, 83. — Canada, Department of 

 Mines : Oil and Gas Map of Southwestern Pennsylvania. 1915, E. H. Hice : 

 Bulletin of Imperial Earthquake Investigation Committee, 84. — Min- 

 eralogic Notes, Series 3, W. T. Schaller : The Emerald Deposits of Muzo, 

 Colombia, J. E. Pogue: Microscopical Determination of the Opaque Min- 

 erals, J. Murdock, 85. — Collection of Osteological Material from Machu 

 Picchu, G. F. Eaton : Birds of North and Middle America, E. Eidgwat : 

 E. Comitato Talassografico Italiana, 86. — British Museum Catalogues : 

 Museum of the Brooklyn Institute of Arts and Sciences : The Involuntary 

 Nervous System, W. H. Gaskell ; Laboratory Manual in General Micro- 

 biology, W. Giltner. 87. 



Miscellaneous Scientific Intelligence — Carnegie Foundation for tbe Advance- 

 ment of Teachers : Public Education in Maryland, A. Flexner and F. P. 

 Bachman, 88. — General Education Board : Napier Tercentenary Memorial 

 Volume, 89. — Mining World Index of Current Literature, 90. 



Obituary — S. P. Thompson: O. Lignier: E. Jungfleisch, 90. 



