C N T ENTS 



Fage 

 Akt. XLIT. — Reconnaissance of a Portion of tht Littl* Colo- 

 rado Valley, Arizona ; by H. E. Gregory I 



XLIII.— Mineral Notes ; by W. E. Ford 



XLIV. — Medasina Walcotti, a Carboniferous Jellyisl 



E. H. Barbour _ _ 505 



XLV. — Carboniferous Eurypterids of Nebraska; by ft. H. 



Barbour . 50*7 



XLYI. — Passing of a Connecticut Rock Shelter : by (>. G. 



MacCurdy (With Plate IV) . .._ 511 



XLVII. — Succession of Faunas at Levis 3 P. Q ; by P. E. 



Raymond 523 



XLVI1I. — Fossil Frogs of North America ; by R. L. Moodif. 531 

 XLIX. — Modifications of the Reduction Test for Timgstic 



Acid ; by G. Torossian 537 



L. — Distribution of the Active Deposit -of Actinium in an 



Electric Field ; by A. N. I^uctax 539 



LI. — Amherst Eclipse Expedition ; by D. Todd 556 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — New Volumetric Method for the Determination of 

 Cobalt in the Presence of Nickel, A. Metzl : Hydrogenization of Oil 

 KlLis : Methods of Quantitative Organic Analysis, P. C. R. Kingscott 

 and R. S. G. Knight, 558. — Essays and Addresses, J. C. Brown: Metal- 

 lurgy, H. Wysor : Introduction to Organic Chemistry, J. T. Stoddard, 

 550.— An Introduction to the Study of Organic Chemistry, H. T. Clark : 

 Relation between Absorption and Wave length of X-rays, M. Siegbahn, 

 560. — X-ray Spectrum of Platinum, H. Seemann, 561. — Spectroscopy of the 

 Extreme Ultra-violet. T. Lyman : Elementary Electricity and M* ;netism. 

 W. S. Franklin and B. Macnutt, 562. 



Geology and Mineralogy — The Climatic Factor as Illustrated in Arid 

 E. Huntington, etc., 563 — Connecticut Geological and Natural fl 

 Survey : Recent Eruptions of Lassen Peak, J. S. Diller, 567.*- West 

 Virginia Geological Survey : Production of Platinum, D. T. Day, 568. 



Astronomy — Theory of the Moon's Motion, E. W. Brown, 569. 



Miscellaneous Scientific Intelligence — Antiquity of Man in Europe, J. Geikte. 

 571. — Award of the Medal of the Royal Society of London : National 

 Academy of Sciences: American Association for the Advancement of 

 Science : British Association for the Advancement of Science : Food Pro- 

 ducts, H. C. Sherman, 572. — Sarawak Museum Journal : Mining World 

 Index of Current Literature, 573. 



Obituary— T. N. Gill: H. Gannett: A. Weismann, 573. 

 Index, 574. 



