CONTENTS. 



Page 



Aet. XXI. — Regular, or specular reflection of the Kontgen 



Rays from polished metallic surf aces ; by O. N. Rood_ 173 



XXII. — lodometric Method for the Determination of Phos- 

 phorus in Iron ; by Chaelotte Faiebanks 181 



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

 drobromic Acids, and the Volumetric Estimation of the 

 same by titration in alkaline solution with Iodine ; by 

 P. E. Beowning _ 185 



XXIV. — Bearpaw Mountains of Montana. Second Paper 



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



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



by J. B. Tyeeell 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. Linebaeger _ ._ :.. 226 



XXX. — Thickness of the Paleozoic Sediments in Arkansas; 



by J. C. Beannee. With a Map (Plate HI) ._.. 229 



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



fossil; by G. C. Beoadhead 237 



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



by A. Agassiz _ . _ 240 



SCIENTIFIC INTELLIGENCE. 



Obituary — Hubert Anson Newton, 245 

 Green: Peter Collier, 246, 



JosiAH DwiGHT Whitney: A. H. 



