C ONTENTS. 



Page 

 Art. I. — The History of a Doctrine; Address by S. P. LANG- 

 LEY 1 



II. — Description of the new mineral, Beryllonite; by Edward 



S. Dana and Horace L. Wells. With Plate I 23 



III. — The Iron Ores of the Penokee Gogebic Series of Michi- 

 gan and Wisconsin ; by C. R. Van Hise. With Plate 

 II 23 



IV. — Recent Observations of Mr. Frank S. Dodge, of the 

 Hawaiian Government Survey, on Halema'uma'u and its 

 debris-cone ; by James D. Dana 48 



V. — Notes on Manna Loa in July, 1888 51 



VI. — A Quartz-Keratophyre from Pigeon Point and Irving's 



Augite-Syenites ; by W. S.. Batlet ".. 54 



VII. — On the occurrence of Hanksite in California ; by 



Henry G. Hanks 63 



VIII. — Sperrylite, a new Mineral; by Horace L. Wells 67 



IX. — On the Crystalline form of Sperrylite ; by S. L. 



Penfield 71 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — On the Vapor-density of the Chlorides of Indium, Gal- 

 lium, Iron and Chromium ; and on two new Chlorides of Indium Nilson and 

 Pettersson: On the Vapor-density of Ferric chloride, FiUEDELand Crafts, 73. — 

 On the Vapor-density of Gallium chloride, Friedel and Crafts: On the Molec- 

 ular Mass of Sulphur, Phosphorus, Bromine and Iodine in Solution, Paterxo 

 and Nasixi : On the Atomic Mass of Osmium, Seubert, 74. — A Class Book of 

 Elementary Chemistry, W. W. Fisher: Examples in Physics, D. E. Jones: Oxy- 

 gen lines in the Solar Spectrum, M. Janssen, 75. — Effect of staining upon dry 

 plates, Kundt: Electrical currents produced by light, Stoletow, 76. 



Geology and Natural History — Cambrian of Bristol County, in Eastern Massa- 

 chusetts, N. S. Shaler, 76. — Silicified wood of Arizona, F. H. Knowlton: Dahl- 

 lite, a new mineral, Brogger and Backstrom : Das Protoplasma als Ferment- 

 organismus, Albert Wigand, 77. — "Ringed" Trees, W. L. Goodwin: A Provi- 

 sional Host, an Index of the Fungi of the United States, "W. G Farlow and A. B. 

 Seymour, 79. — Bibliotheca Zoologica II, bearbeitet von 0. Taschenberg, 80. 



