CONTENTS 



Page 



Art. XII. — Origin of Coral Reefs and Islands ; by J. D. 



Dana, 89 



XIII. — Meteorite of Fomatlan, Jalisco, Mexico ; by C. U. 



Shepard, 105 



XIV. — Occurrence of Allanite as an accessory constituent of 



many rocks; by J. P. Iddijstgs and W. Cross,. 108 



XV. — Crystals of Aualcite from Phoenix Mine, Lake Superior 



Copper Region; by S. L. Penfield, ... 112 



XVI. — Differential Resistance Thermometer; by T. C. Mest- 



DEX H ALL, 114 



XVII. — Impact Friction and Faulting; by G. F. Becker, .. 116 



XVIII. — A Standard of Light; by J. Trowbridge, 128 



XIX.— On Hanksite ; by W. E. Hidden, 133 



XX. — Mineralogical Notes; by E. S. Dana and S. L. Pen- 

 field, _ ._ 136 



XXI. — Amount of moisture which Sulphuric Acid leaves in 



a Gas ; by E. W. Morley, 140 



XXII. — Local Deflections of the Drift Scratches in Maine ; 



by G. H. Stone, 146 



XXIII. — Successional relations of the species in the French 



Old-Tertiary; by O. Meyer,.. _. :... 151 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Method for the Determination of Nitrogen, Arnold, 

 153. — Heat of combustion of Carbon and of Organic compounds, Berthelot 

 and Vieille, 154. — Absorbing agent for Oxygen, Von der Pfordten, 155. — 

 Method of separating Selenium and Tellurium, Divers and Shbio.se ; Illuminat- 

 ing power of Ethane and Propane, P. P. Frankland; Illuminating power of 

 Methane, Wright, 156. — Toughened Pilter-papers, Francis ; Crystallized 

 Tricupric sulphate, Shenstone, 157. — Molecular Weight of liquid Water, Thosi- 

 sen, 158. 



Geology and Mineralogy. — Yolcanic nature of a Pacific island not an argument for 

 little or no subsidence, J. D. Dana, 158. — Physical Features of Scotland, J. 

 Geikle, 1 59. — Pennsylvania Geological Survey, Eeports recently issued, 

 160. — Geological Survey of New Jersey, G. H. Cook, 161. — Contributions to the 

 knowledge of the Older Mesozoic Flora of Virginia, W. M. Fontaine, 162. — 

 Syenite and Gabbro, M. E. Wadsworth : Thermal effect of the action of aqueous 

 vapor on feldspathic rock, C. Barus: New localities of Erythrite, W. P. Blake, 

 163. 



Botany.— Course of practical instruction in Botany, F. O. Bower and S. H. Vines : 

 Text-Book of Structural and Physiological Botany, 0. W. Thoji^ and A. W. 

 Bennett: Le Potager d'un Curieux: Histoire, Culture, et Usages de 100 

 Plantes comestibles peu connues ou inconnues, A. Pailleux et D. Bois, 164. — 

 Contributions to American Botany. S. Watson, 166. —Talks afield about Plants 

 and the Science of Plants, L. H. Bailey, Jr., 167. 



Miscellaneous Scientific Intelligence. — Report of the Secretary of the Smithsonian 

 Institution, Spencer F. Baird, 167. — American Association for the Advance- 

 ment of Science: Report on the Museums of America and Canada, V. Ba~ll, 168. 



Obituary— T. R. Peale, 168. 



