CONTENTS. 



Number 9. 



Page 



Art. XXI. — Regular or specular reflection of the Rontgen 



Rays from polished metallic surfaces; by O. N". Rood. 173 



XXII. — lodometrio Method for the Determination of Phos- 

 phorus in Iron ; by Charlotte Fairbanks 181 



XXIII. — Reduction of Vanadic Acid by Hydriodic and Hy- 

 drobromic Acids, and the Volumetric Estimation of the 

 same by titration in alkaline solution with Iodine ; by 

 P. E. Browning 185 



XXIV. — Bearpaw Mountains of Montana. Second Paper 



(Part II); by W. H. Weed and L. V. Pirsson 188 



XXV. — Is the land around Hudson Bay at present rising ? 



by J. B. Tyrrell 200 



"XXVI.^Principles of North American pre-Cambrian Geol- 

 ogy; by C. R. Van Hise. With an appendix on Flow 

 and Fracture of Rocks as related to Structure; by L. 

 M. HosKiNS _-- 205 



XXVII. — Studies upon the Cyperacese ; by T. Holm 214 



XXVIII. — Bethany Limestone of the Western Interior Coal 



Field; by C. "r. Keyes... 221 



XXIX. — Surface Tension of Mixtures of Normal Liquids; 



by C. E. LlNEBARGEK 226 



XXX. — Thickness of the Paleozoic Sediments in Arkansas; 



by J. C. Branner. With a Map (Plate III) 229 



XXXI. — Devonian of North Missouri, with notice of a new 



fossil; by G. C. Broadhead 237 



XXXII. — A Visit to the Great Barrier Reef of Australia ; 



by A. Agassiz _ 240 



SCIENTIFIC INTELLIGENCE. 



Obituary— BuBE-RT Anson Newton, 245: Josiah Dwight Whitney: A. H. 

 G-reen: Peter Collier, 246. 



