

C O N T K X T 8 . 



Aim. VL — The Coral -reef Problem and the Evidence of the 



Funafuti Borings ; by E. \Y. Skbats '81 



VII. — Tlie Estimation of Phosphorous, Ilypophosphoric and 

 Phosphoric Acids in Mixture ; by R. G. Van Name 

 and W. J. Huff ... 



VIII. — The Rate of Hydrolysis and Electrical Conductivity 

 of Ilypopliosplioric Acid Solutions ; by R. G. Van 

 Name and W. J. Huff 103 



IN. — On the Occurrence of Ilvaite in the South Mountain 

 Mining District, Owyhee County, Idaho ; by E. "V. 

 Shannon- ... __ 118 



X. — The Silurian Arisaig Series of Arisaig, Nova Scotia ; 



hy F. H. Al cLeaKN 1 2(i 



SCIENTIFIC INTELLIGENCE. 



Physics — Complex Atoms, W. D. Harkins, 140. — Disodinm 

 Nitrite. E. B. Maxted : Recovery of Potash from Greenland, W. H. 

 iiLTO.x: Method for the Determination of Rubidium and Caesium in 

 Plant Ash, W. 0. Robinson, 142. — Absorption Bands of Ozone, A. Fowler 

 and R. J. Strutt, 14:>. — Mathematics for Agriculture and General Si i 

 A. M. Kenyon and W. V. Lovrrr: Radioactivity of Meteorites, T. T. 

 Quirke and L. Finkelstein, 144. 



■i;i — Geology of the Navajo Country, a Reconnai of Parts of 



Arizona. New Mexico, and Utah, H. E. Gregory, 145. — Cyclical Varia- 

 tions in Eruption at Kilauea. IT. 0. Wood : Geology of Part of the 

 Transkei, A. L. nu Toit, 146.— Geology of the Moonta and Wallaroo 

 Mining District, R. L. Jack, 147.- Geology and Mineral Resources of the 

 Reefton Subdivision (Westport and North Westland Divisions), J. Hen- 

 derson: Vegetation and Flora of Lord Howe Island, W. R. B. Oliver, 

 148. — Block Mountains in New Zealand, C. A. Cotton: Origin of Chert in 

 the Burlington Limestone, W. S. Tarr, 149. 



ientific Intelligence — Report of the Secretary of the Smith- 

 sonian Institution, C. D. Walcott, for 1917, 149. — Report of the Librarian 

 of Congress, H. Putnam: Audubon the Naturalist, a History of his Life 

 and Time, F. H. Herrick, 150.— Mammalian Anatomy, A.Davison, 151.— 

 Anatomy of Woody Plants, E. C. Jeffrey, 152. 



