IV CONTENTS. 



Number 86. 



Page 

 Art. VI.— "Good Seeing"; by S. P. Langley (With 



Plate I) 89 



VII. — Native Arsenic from Montreal ; by N. "N. Evans 92 



VIII. — Electromotive Force in Plants ■; by A. B. Plowman 94 



IX. — Ionization of Water Nuclei; by C. Barus 105 



X. — Morphogenesis of Platystrophia. A Study of the Evo- 

 lution of a Paleozoic Brachiopod ; by E. R. Cumings.. 121 



XL — Condition of Platinum in the Nickel-Copper Ores from 



Sudbury ; by C. W. Dickson __ 137 



XII. — Lecture Experiment on Surf ace Tension and Superficial 



Viscosity ; by J. E. Burbank 140 



XIII. — Mylagaulodon, a New Rodent from the Upper John 



Day of Oregon ; by W. J. Sinclair _ 143 



XIV. — Studies in the Cyperacese : by T. Holm 145 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Artificial Diamonds from Fused Silicates, R. v. 

 Hasslinger : Fluorescence and Phosphorescence of Diamonds, Rosenheim, 

 153. — Radio-active Tellurium, Marckwald : Action of Hydrochloric Acid 

 upon Aluminum, Chromium, and Ferric Sulphates, Recoura : Alkali- 

 metal Hydrides, Moissan, 154. — Combustion of the Three Varieties of 

 Carbon, Moissan : Ammoniacal Cupric Chlorides, Bouzat : Peculiar Radia- 

 tion Phenomenon, L. Graetz, 155. — Photography of the Ultra-Red Iron 

 Spectrum, H. Lehmann : Excited Radio-activity and its Transmission, 

 E. Rutherford, 156. — Magnetic Declination Tables and Isogonic Charts 

 for 1902, L. A. Bauer : Manual of Advanced Optics, C. R. Mann, 157. 



Geology — United States Geological Survey, 157.— Glacial Formations and 

 Drainage Features of the Erie and Ohio Basins, F. Leverett : Les Varia- 

 tions periodiques des Glaciers, Finsterwalder and Muret, 160. — Cause 

 of the Glacial Period, H. L. True : Tooth Characters and Revision oi 

 North American Species of the Genus Equus, J. W. Gidley : Evolution 

 of the Horse, W. D. Matthew, 161. 



Miscellaneous Scientific Intelligence. — Publications of the West Hendon 

 House Observatory, Sunderland, W. T. Backhouse : Philosophical Essay 

 on Probabilities, P. Simon : Knowledge Diary and Scientific Hand-book 



