CONTENTS. 



Page 



Art. XLI. — Experiments on the Reception by Wires of 



Electric Waves ; by C. A. Chant 403 



XLII. — Spectra of Gases at High Temperatures ; by J. 



Trowbridge . . 420 



XLIII. — Two New River Reptiles from the Titanothere 



Beds ; by F. B. Loomis 427 



XLIV. — Emmonsite (?) from a New. Locality; by W. F. 



HlLLEBRAND _ 433 



XLV. — Matawan Formation of Maryland, Delaware, and 

 New Jersey, and its relations to overlying and under- 

 lying Formations ; by W. B. Clark . . _ 435 



XLVI. — Precipitation of Barium Bromide by Hydrobromic 



Acid; by N. C. Thorne 441 



XL VII. — Proembryo of the Bennettitese ; by Gr. R. Wieland. 



(With Plate XX). _ __ _. 445 



XLVIII. — Minerals from the Clifton-Morenci District, Ari- 

 zona ; by W. Lindgren and W. F. Hillebrand ..,._. . 448 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics - Conversion of Ammonia into Nitrites and Nitrates, 

 W. Traube and A. Biltz : Is Tyndall's Optical Method Capable of Show- 

 ing the presence of Molecules in Solutions ? L. de Bruyn and Wolff : 

 New Modification of Silicon, Moissan and Siemens, 461. — Phosphorescent 

 Zinc Sulphide, Grune : Atomic Weight of Eubidium, E. H. Archibald : 

 Eadio-active Cinnabar, Losanitsch, 462. — Materialien der Stereochemie, 

 C. A. BiscHOFtr : Heterogenen Gleichgewichte vom Standpunkte der 

 Phasenlehre, H. W. B. Roozeboom : Phosphorescence, P. Lenard and V. 

 Klatt : Lippman's Color Photography, L. Pfaundler, 463. — Change of 

 Velocity of Cathode Rays in passing through thin Metallic Layers, G. E. 

 Leithauser : Insulation in a Vacuum, T£elvin : Slow Transformation 

 Products of Radium, Rutherford, 464.— Text-book of General Physics 

 for High Schools and Colleges, J. S. Ames, 465. 



Geology and Natural History — Stratigraphy and Paleontology of the Niagara 

 of Northern Indiana, E. M. Kindle and C. L. Breger, 465. — Report on 

 an Exploration of Ekwan River, Sutton Mill Lakes and part of the west 



. coast of James Bay, D. B. Dowling, 469. — Zinc and Lead Deposits of 

 Northern Arkansas, etc., E. 0. Ulrich, 470. — Monographic de l'He 

 d'Anticosti (golfe Saint-Laurent), J. Schmidt, 471. — Handbuch der Min- 

 eralogie, C. Hintze : Volcanic Pipes of Sutherland, A. W. Rogers and A. 

 L. duToit : Treatise on the British Freshwater Algae, G. S. West, 472. — 

 Monograph of the British Desmidiaceee, W. West and G. S. West, 473. 



Miscellaneous Scientific Intelligence — Cyclones of the Far East, J. Algtje : 

 Select Bibliography of Chemistry, 1492-1902, H. C. Bolton : Kritische 

 Studien liber die Vorgange der Autoxydation, C. Engler and J. Weiss- 

 berg, 474. 



Index to Vol. XVIII, 475. 



3 13 ' 





