CONTENTS TO VOLUME XXIY. 



Number 139. 



Art. I.— Current Theories of Slaty Cleavage ; by G. F. 



Becker . i 1 



II. — Origin and Definition of the Geologic Term Laramie ; 



by A. C. Veatch 18 



III. — New Method for the Determination of the Hardness of 



Minerals ; by H. Z. Kip 23 



IV. — Cretaceous Stratigraphy of the Santa Clara Valley 



Region in California ; by Roderic Crandall . 33 



V. — Notes on the Habits and External Characters of the 



Solenoclon of San Domingo (Solenodon paradoxus) ; by 



A. H. Verrill 55 



VI. — Mississippian (Lower Carboniferous) Formations in the 



Rio Grande Valley, New Mexico ; by C. H. Gordon . . 58 

 VII. — Iodometric Determination of Copper ; by F. A. Gooch 



and F. H. Heath . 65 



VIII. — Strength and Elasticity of Spider Thread ; by J. R. 



Benton 75 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — New Intermediate Product in Thorium, Hahn : 

 Interference of Fluorides with the Precipitation of Alumina, Hinrichson, 

 79. — Magnetic Compounds of Manganese with Boron, Antimony and Phos- 

 phorus, Wadekind, 80. — New Variety of Chromium, Jassonneix : Memoir 

 and Scientific Correspondence of the late Sir George Gabriel Stokes, 81. — 

 Elektrische Fernphotographie unci Ahnliches, A. Korn, 82. 



Geology — United States Geological Survey Publications, 82. — Wisconsin 

 Geological and Natural History Survey, 83. — ■ Geological Survey of Ala- 

 bama, E. A. Smith : Geological Survey of Western Australia, Mt. Margaret 

 Goldfield, C. G. Gibson, 84.— Geology of the Marysville Mining District, 

 Montana, J. Barrell, 85. — Invertebrate Paleontology of the Upper Per- 

 mian Eed Beds of Oklahoma and the Panhandle of Texas, J. W. Beede : 

 Stromatoporoids of the Guelph Formation in Ontario, W. A. Parks, 86. 



Miscellaneous Scientific Intelligence. — Bulletin of the Bureau of Standards, 

 S. W. Stratton : Carnegie Institution of Washington, 87. — Field Museum 

 of Natural History, 88. — Twenty-fourth Annual Report of the Bureau of 

 American Ethnology to the Secretary of the Smithsonian Institution, 1902- 

 1903, W. H. Holmes, 89. — Bulletin of the Imperial Earthquake Inves- 

 tigation Committee : Studies in Plant Chemistry and Literary Papers, 

 H. A. Michael, 90. — Beitrage zur chemischen Physiologie, F. Hofmeister: 

 Common Bacterial Infections of the Digestive Tract and the Intoxications 

 arising from them, C. A. Herter : Handbook of American Indians North 

 of Mexico, F. W. Hodge : University Text-Book of Botany, D. H. Camp- 

 bell, 91. — Birds of the Chicago Area, F. M. Woodruff : Seventh Inter- 

 national Zoological Congress : Centenary of the Geological Society of 

 London : Neues Jahrbuch fur Mineralogie, Geologie, und Palaontologie, 

 92. 



