CONTENTS 



Page. 



Art. XI. — History of the Changes in the Mt. Loa Craters ; 



by J. D. Dana. Part I, Kilauea 81 



XII. — Phenomena of Binocular Vision ; by J. LeConte 97 



XIII. — Crocidolite from Cumberland, R. I. ; by A. H. Ches- 

 ter and F. I. Cairns . - 108 



XI V.— Chemical Integration ; by T. S. Hunt 116 



XV. — Verification of Tornado Predictions ; by H. Allen 



Hazen _ 127 



XVI.— Studies in the Mica Group ; by F. W, Clarke . . . : . 131 

 XVII. — Serpentine (Peridotite) occurring in the Onondaga 



Salt-group at Syracuse, N. Y. ; by G. H. Williams 137 



XVIII. — Note on the Genus Archeocyathus of Billings ; by 



C. D. Walcott 145 



SCIENTIFIC INTELLIGENCE. 



Physics and Chemistry. — Cause of Iridescence in Clouds, G-. J. Stoney, 146. — 

 Experiments on the Viscosity of Ice, J. F. Main, 149. — Steam Calorimeter, 

 Bunsen : Electrical Resistance of Antimony and Cobalt in a Magnetic Field, G-. 

 Fae: Effect of Electricity on Dust, R. Nahrwold: The Hall Effect, A. Yon 

 Ettinghatjsen and W. Nernst, 151. — Practical Electricity, W. E. Atrton: 

 Synthesis of Juglon, Bernthson and Semper, 152. — New Basis for Chemistry, 

 a Chemical Philosophy, T. S. Hunt, 153. 



Geology and Mineralogy. — Geology of Long Island, F. J. H. Merrill, 153. — 

 Mount Taylor and the Zufii Plateau, C. E. Dtttton, 155. — Etudes sur les 

 Bilobites et autres fossiles des Quartzites de la base du Systeme Silurique du 

 Portugal, J. F. N. Delgado, 157.— The Geology of England and Wales, with 

 Notes on the Physical Features of the Country, H. B. Woodward : Geologie 

 von Bayern, K. N. ton Gumbel, 158. — Invertebrates from the Eocene of 

 Mississippi and Alabama, 0. Meter : Contributions to Mineralogy, F. A. 

 Genth: Silver in volcanic Ash, Mallet: Sixth Annual Report of the State 

 Mineralogist' of California, H. G. Hanks, 159. — Minerals occurring in the 

 neighborhood of Baltimore, G. H. Williams. 160. 



Miscellaneous Scientific Intelligence. — List of Observatories and Astronomers : 

 Transactions of the Meriden Scientific Association, 160. — Obituary. — William 



BOOTT, 160. 



