CONTENTS. 



28 

 37 



4.1 



65 



79 



Page 

 Art. I. — Revised Geologic Time-table for North America; 



by C. Schuchert and J. Barrell _ 1 



II. — Relations of the Alexandrian Series in Illinois and Mis- 

 souri to the Silurian Section of Iowa; by T. E. Savage 



III. — New Occurrence of Scapolite; by J. Stansfield 



IV. — Improvement of the Barium Sulphate Determination of 



Sulphur in Soluble Sulphates; by W. A. Turner 41 



V. — Unconformity in Narragansett Basin of Rhode Island and 

 Massachusetts; by G. F. Loughlix and L. A. Hechinger 



VI. — Cordaitean Wood from Indiana Black Shale; by Marion 

 G. Elkins and G. R. Wieland. (With Plates I and II.) 



VII. — Occurrence of Pyroxenite and Hornblendite in Bahia, 

 Brazil ; by II. S. Washington _ 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Atomic Weight of Lead from Ceylon Thorite, F. 

 Soddy and H. Hyman: Extraction of Germanium from the Waters of 

 Vichy, J. Bardet. — Acid Salts of Dibasic Acids, E. Jungfleisch and P. 

 Landrieu: Fluorsulphonic Acid, 0. Buff and H. J. Braun: Density and 

 Atomic Weight of Neon, A. Leduc: Chart of the Carbon Compounds, C. 

 W. Cuno, 92. — New X-Kay Spectrograph, M. de Broglie: Ultra-violet 

 Limit of the Solar Spectrum, A. Wigand, 93. — Change in a Lunar Crater, 

 W. H. Pickering : Propagation of Light in Dispersing Media, A. Sommer- 

 feld and L. Brillouin, 95. — Two New Sciences, G. Galilei, 97. — Nor- 

 wegian Aurora Polaris Expedition, 1902-1903, Dr. Birkeland, 98. 



Geology and Mineralogy — Geology of Saratoga Springs, Cushing and Ruede- 

 mann, 99. — Ontogeny of Paradoxides and Isotelus, Raymond: Development 

 in fossil Cephalopoda, J. P. Smith: Tanner's Creek section of Cincinnati 

 Series Indiana; Cumings and Calloway. 100.— Mud Crocks open under 

 Water. E. S. Moore, 101.— Engineering Geology, H. Ries and T. L. 

 Watson: U. S. Bureau of Mines, Holmes: Geological Survey Canada, 102. 

 — New Geologic Map of the State of New Jersey: Hawaiian Volcano 

 Observatory. 103.— Common Minerals and Rocks, Hobbs: Minerals of the 

 Black Hills, Ziegler: Kristallberechnung, Gossner, 104. 



Botany and Zoology — Weed Flora of Iowa, L. H. Pammel. 104. — Irritability 

 of Plants, J. C. Bose: Introduction to Botany, J. Y. Bergen and O. W. 

 Caldwell: Zentral-Afrika-Expedition 1907-1908.— Elementary Principles 

 of General Biology, J. F. Abbott: Biology. General and Medical. J. xMc- 

 Farland, 100.— Starfishes of the North 'Pacific Coast, A. E. Verrill: 

 Memoirs of^the Queensland Museum, R. Hamlyn-Harris, 107. —Ungulate 

 Mammals in the British Museum: Annual Report Field Museum, 108. 



Astronomy and Mathematics — Introduction to Celestial Mechanics. F. R. 

 MOULTON, 108 — Memorabilia Mathematical, R. E. Morjtz : Allegheny 

 Observatory, 109. — U. S. Naval Observatory, Volume VIII: Observatory 

 of the University of Virginia: Carother's Observatory: Napier Tercen- 

 tenary Celebration: Logarithmic Tables. C. I. Moore, 1 10. 



Miscellaneous Scientific Intelligence — U. S. National Museum, R. Rathbun: 

 U, S.'CoasI and Geodetic Survey: Carnegie Institution of Washington, 

 111.— Annual Report Board of Scientific Advice for India 1912-13, 112. — 

 American Philosophical Society: San Francisco Meeting of A. A. A. S., 113. 

 —British A. A. SL: A Theory of Interest: Franklin Institute award Elliott 

 Oresson Medals: Science Reports of the Tohoku Imperial University. 114. 



Obituary — E. Suess, 115.— A. E. Barlow: A, F. Chamberlain: J. J. M 5 

 P. H. Pyl-Smith: J. YV. Swan: M. P. E. L. Van Tieghem: K.Chun, 116. 



