iv CONTENTS. 



Nuiriber 98. 



Page 

 Art. VIII. — Properties of a Radio-active Gas found in the 

 Soil and Water near New Haven ; by H. A. Bumstead 

 and L. P. Wheeler 97 



IX. — Structure of the Upper Cretaceous Turtles of New 

 Jersey : Adocus, Osteopygis, and Propleura ; by G. R. . 

 Wieland. (With Plates I-IX) .._ 112 



X. — Studies of Eocene Mammalia in the Marsh Collection, 



Peabody Museum ; by J. L. Wortman _ 133 



XL — Structure of the Piedmont Plateau as shown in Mary- 

 land; by E. B. Mathews. (With Plate X) 141 



XII. — Direct Micrometric Measurement of Fog Particles ; 



by C. Barus 160 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Formation of Ozone, E. Goldstein : Peculiar Prop- 

 erty of Some Hydrated Salts, A. de Schulten, 171. — Attempts to Prepare 

 Nitrogen Fluoride, Eupp and Geisel : Quantitative Chemical Analysis, C. 

 E. Fresenius, 172. — Analytical Chemistry of Uranium, H. Brearley : 

 Chemical Calculations, H. L. Wells : Solar Eadiation and the Pressure 

 of Light, Poynting, 173. — Blondlot's n-rays, Blondlot, 174. — Eowland 

 Effect, Himstedt, 175. 



Geology and Natural History — United States Geological Survey, 175. — 

 Geology of the Hawaiian Islands, W. H. Dall : Geological Commission, 

 Cape of Good Hope, G. S. Constorphine, 177. — Geological Society of 

 South Africa, 178. — Action of Eadium, Eoentgen Eays and Ultra-Violet 

 Light upon Minerals and Gems, Kunz and Baskerville : Optical Charac- 

 ters of Anthophyllite : a Correction, C. H.- Warren: Chemical Composi- 

 tion of Igneous Bocks expressed by means of Diagrams, J. P. Iddings, 179. 

 — Petrographisches Prakticum, B. Rheinisch : Les Boches alcalines carac- 

 terisant. la Province petrographique d'Ampasindava, A. Lacroix, 180. — 

 Notes on the Rocks of Nugsuaks Peninsula and its Environs, Greenland, 

 W. C. Phalen : Monograph of the Coccidae of the British Isles, R. New- 

 stead, 181. — Catalogue of the Lepidoptera Phalaense in the British Museum, 

 G. F. Hampson : General Zoology, C. W. Dodge, 182. 



Miscellaneous Scientific Intelligence — American Association, 182. — Carnegie 

 Institution of Washington, Year Book, No. 2, 1903 : Physikalisch-chem- 

 isches Centralblatt, 183.— Description of the Brains and Spinal Cords of 

 Two Brothers dead of Hereditary Ataxia, L. F. Barker : Field Columbian 

 Museum : Planetary System, F. B. Taylor : Metallic Ornaments of the 

 New York Indians, W. M. Beauchamp : Queries in Ethnography, A. G. 

 Keller : Knowledge Diary and Scientific Handbook for 1904, 184. 



