CONTENTS. 



Number 213. 



Page 



Art. XVI. — Cambrian Fossils from Mount Stephens, North- 

 west Territory of Canada; by Charles D. Walcott._ 161 



XVII. — History of Changes in the Mt. Loa Craters ; by 

 J. D. Dana. Relations of Kilauea to Mt. Loa and 

 Contrast between Volcanoes of the Mt. Loa and Vesu- 

 vius types - 167 



XVIII. — On the formation of the deposits of Oxides of 



Manganese; by F. P. Dttnnlngton 175 



XIX. — Maxwell's Theory of the Viscosity of Solids and 

 Certain Features of its Physical Verification; by Carl 

 Barus 178 



XX. — On the Origin of Primary Quartz in Basalt ; by Jo- 

 seph P. Iddings 208 



XXI. — Mineralogical Notes ; by Geo. F. Kunz..... 222 



SCIENTIFIC INTELLIGENCE. 



Miscellaneous Intelligence. — Explorations of the Gulf Stream, Lieut. J. E. Pills- 

 bury, 225. 



Obituary. — Henry Carvill Lewis, James Stevenson, Albert D. Hager, 226. 



