CONTENTS. Vll 



Numlber 245. 



Page 



Art. XLI. — Relationship of the Pleistocene to the Pre- 

 pleistocene of the Mississippi Basin, south of the glacia- 

 tion limit ; by T. C. Chamberlin and R. E>. Salisbury. 359 

 XLII. — Measures of the Intensity of Solar Radiation ; by 



Wm. Ferrel 3*78 



XLIII. — Age of the Saganaga Syenite ; by II. V. Winchell 386 



XLIV.— Self-feeding Sprengel Pump; by H. L. Wells 390 



XLV. — Contributions to Mineralogy, No. 50 ; by F. A. 

 Genth; with Cry stallographic Notes by S. L. Penfield 



and L. V. Pirsson 394 



XL VI.— Contributions to Mineralogy, No. 51; by F. A. Genth 401 

 XLVIL— Columbite of the Black Hills; by W. P. Blake.. 403 

 XLVIII. — The Raised Reefs of Fernando de Noronha ; by 



H. N. Ridley 406 



XLIX. — Cause of Active Compressive Stress in Rocks and 



Recent Rock Flexures ; by T. M. Reade 409 



L. — Phosphates from the Black Hills ; by W. P. Hbadden. 415 

 LI. — Certain Peculiarities in the Behavior of a Galvanometer 



when used with the Thermopile; by E. Merritt 417 



LII. — Supplementary Notice on the Polycrase of North and 



South Carolina; by W. E. Hidden and J. B. Mackintosh 423 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Speed of Chemical Reactions in Jelly, Reformatsky, 

 425. — Direct-reading of Volumes in Vapor-density Determinations, Lunge and 

 Neuberg, 426. — Hydrazoic Acid, Curtius and Radenhausen : Production of 

 Arabinose from Wheat bran, Steiger and Schulze : Distinguishing Arsenic 

 from Antimony, Deniges, 427. — Priestley's Eudiometric method, Wanklyn: 

 Crystalline Liquids, Lehmann: Refractive indices of Water, Bruhl, 428. — 

 Genesis of the Elements, W. Crookes, 429.— Geschichte der Photographie. C. 

 Schiendl, 430. — Die Elektrischen Verbrauchsmesser E. de Fodor : Das Total- 

 reflectometer, etc., Pulfrich : Appleton's School Physics, 431. — Handworter- 

 buch der Chemiker, C. Schaedler : Eibliotheca Polytechnica, 432. 



Geology and Natural History. — Rock-fracture at the Combined Locks Mill, 

 Appleton, Wisconsin, F. Cramer, 432. — Bulletin of the Geological Society of 

 America, Vol. II, 434. — Cambrian fossils in the Stockbridge limestone of 

 Vermont, J. E. Wolff : Geological Survey of Kentucky : Geological Survey 

 of Missouri, S. A. Miller: Geological Survey of Arkansas, J. C. Branner, 

 435. — Geological Survey of Texas: Geological Survey of Alabama: Bibliogra- 

 phy of Palaeozoic Crustacea from 1698 to 1889, A. W. Vogdes, 436 — Organiza- 

 tion of the Fossil Plants of the Coal-Measures, W. C. Williamson, 437. — 

 Catalogue of the Fossil Cephalopoda in the British Museum, Part II, A. H. 

 Foord : Mineralogical notes, W. E. Hidden and J. B. Mackintosh, 438.— 

 Mineralogical notes, W. E. Hidden, 439. — Tenth Annual Report of the State 

 Mineralogist of California, 440. — Allgemeine Chemische Mineralogie. Doelter : 

 Index der Krystallformen der Mineralien, Goldschmidt : Gray's Manual of 

 Botany, Watson and Coulter, 441. — Hypertrophic des lenticelles chez la pomme 

 de terre, etc., Devaux: The Nursery-Book, Guide to the Multiplication and Pol- 

 lination of Plants, Bailey, 442. — Turbellaria Accela, L. von Graff, 443. 



Miscellaneous Scientific Intelligence. — Recent eruption of Kilauea, E. P. Baker : 

 Depths of 3000 fathoms iu the Indian Ocean, 443. — Catalogue of the Crawford 

 Library: Dr. Goodale in New Zealand: Missouri Geological Survey, 444. 



Obituary. — James B. Mackintosh, 444. 



