IV CONTENTS. 



Number 164. 



Page 



Art. XI. — Electric Arc between Metallic Electrodes ; by 



\Y. G. Cady and G. W. Vinal _'. 89 



XII. — Heat of Formation of Trisodiura Orthophosphate, 

 Trisodium Orthoarsenate, the Oxides of Antimony, Bis- 

 muth Trioxide ; and fourth paper on the Heat of Com- 

 bination of Acidic Oxides with Sodium Oxide ; by 

 W. G. Mixter 103 



XIII. — Quantitative Precipitation of Tellurium Dioxide and 

 its Application to the Separation of Tellurium from 

 Selenium ; by P. E. Browning and W. R. Flint 112 



XIV. — Coloration in Peroxidized Titanium Solutions, with 

 Special Reference to the Colorimetric Methods of Esti- 

 mating Titanium and Fluorine ; by H. E. Merwin 119 



XV. — New Fossil Coleoptera from Florissant ; by Hi F. 



Wickham 126 



XVI. — Lighthouse Granite near New Haven, Connecticut ; 



by F. Ward . . „ 131 



XVII. — Silurian Section at Arisaig, Nova Scotia; by W. H. 



TWENHOFEL . . _ _ 143 



XVIII.— Fish Fauna of the Albert Shales of New Bruns- 

 wick ; by L. M. Lambe .. 165 



XIX. — Diatomaceons Dust on the Bering Sea Ice Floes ; by 



E. M. Kindle _ _ 175 



XX. — Modification of Lavoisier and Laplace's Method of 

 Determining the Linear Coefficient of Expansion ; by 

 S.R.Williams - 180 



XXI. — New Proboscidean from the Lower Miocene of 



Nebraska ; by H. J. Cook 183 



XXII. — Mineral Notes from the Mineralogical Laboratory 

 of the Sheffield Scientific School of Yale University ; 

 by W. E. Ford, F. Ward and J. L. Pogue_ 185 



SCIENTIFIC INTELLIGENCE. 



Geology — Tidal and Other Problems ; Contributions to Cosmogony and the 

 Fundamental Problems of Geology, T. C. Chamberlin, etc., 188. — 

 Second Appendix to the Sixth Edition of Dana's System of Mineralogy, 

 E. S. Dana and W. E. Ford : Sketch of the Mineral Eesources of India, 

 T. H. Holland : Igneous Eocks : Composition, Texture and Classification, 

 Description and Occurrence, J. P. Iddings, 196. 



Obituary — Simon Newcomb, 196. 



