CONTENTS. 



Page 

 Art. I. — Contributions to the Geology of Rhode Island ; by 



B. L. Johnson and C. H. Warren 1 



II. — Esterifieation of Benzoic Acid ; by I. K. and M. A. 



Phelps, and R. W. Osborne 39 



III. — Description of the Williamstown Meteorite ; by E. E. 



Howell ." . 49 



IV. — Descriptions of Tertiary Insects ; by T. D. A. Cock- 



erell -. 51 



V. — Stratigraphy of the Mt. Taylor Region, New Mexico ; 



by H. W. Shimer and M. E. Blodgett . . 53 



VI. — Mammalian Migrations between Europe and North 



America ; by VV. D. Matthew 68 



VII.— Notes on Powellite and Molybdite ; by W. T. 



SCHALLER 71 



VIII. — Hydrolysis of Ammonium Molybdate in the Presence 



of Iodides and Iodates ; by S. E. Moody 76 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Parent-Substance of Radiuin, Hahn : Reduction of 

 Arsenic Trisulphide and Pentasulphide to Disulphide, Ehrenfeld, 79. — 

 Titanium trichloride for Volumetric Analysis, Knecht and Hibbert : 

 Traite" de Chemie Analytique Qualitative, Duparc et Monnier : Kurzes 

 Lekrbuch der organischen Chemie, W. A. Notes, 80. — History of Chem- 

 istry, H. Bauer : Beitrage zur chemischeu Physiologie, F. Hofmeister : 

 Immuno-Chemistry, S. Arrhenius, 81. 



Geology and Mineralogy — Geological Survey of New Jersey, H. B. Kummel : 

 Geology and Natural Resources of Indiana, W. S. Blatchlet, 82. — West 

 Virginia Geological Survey County Reports, G. P. Grimsley and I. C. 

 White : Geological Map of the Colony of the Cape of Good Hope, A. L. 

 du Toit : Geology of the Parapara subdivision, Karamea, Nelson, J. 

 Mackintosh Bell, 83. — Om Fladdale og Randmoraener i Jylland ; N. V. 

 Ussins: Die Alpen im Eiszeitalter, A. Pence mm E. Bruckner: Re- 

 vision of the Pelycosauria of North America, E. C. Case, 84. — Skull of 

 Brachauchenius, S. W. Williston, 85. — Hell Creek Beds of the Upper 

 Cretaceous of Montana, B. Brown : Ueber die Dinosaurier der Aussereu- 

 ropyeischen Trias, F. v. Huene, 86. — Diamonds in garnet-pyroxene 

 nodules in Kimberlite, 87. 



Miscellaneous Scientific Intelligence — Microscopy of Technical Products, T. 

 F. Hanausek, 87. — Lehrbuch der Mikroskopischen Technik, B. Rawitz, 

 88.— Souvenirs Entomologiques, J. H. Fabre : Papers and Addresses of 

 the Ninth Annual Session of the American Mining Congress, 1906 : 

 Ricerche Lagunari per cura di G. P. Magrini, L. be Marchi, T. Gnesotta : 

 Die Eistrift aus dem Bereich der Baffin- Bai beherrscht von Strom und 

 Wetter. L. Mecking : Ostwald's Klassiker der Exakten Wissenschaften, 89. 



Obituary — Professor A. Hall, 90. — Dr. B. J. Harrington, 91. — Lord 

 Kelvin : Dr. L. M. Underwood, 92. 



