VI CONTENTS. 



Number 88. 



Page 

 Art. XXV. — Gaseous Constitution of the H. and K. lines 

 of the Solar Spectrum, together with a discussion of 

 reversed gaseous lines ; by J. Trowbridge 243 



XXVI. — Boys Radiomicrometer ; by C. C. Hutciiins 249 



XXVII. — Meteoric Iron from N'Goureyma, near Djenne, 

 Province of Macina, Soudan; by E. Cohen. (With 

 Plates II-IV.) 254 



XX VIII.— Collection of Triassic Fishes at Yale ; by G. F. 



Eaton. (With Plates V and VI.) 259 



XXIX. — Mechanics of Igneous Intrusion ; by R. A. Daly.. 269 



XXX. — Brachiosaurus altithorax, the largest known Dino- 

 saur ; by E. S. Riggs 299 



XXXI. — New Structural Characters of Paleozoic Cock- 

 roaches ; by E. H. Sellards. (With Plates VII and 

 VIII.) 307 



XXXII.— -Bath Furnace Meteorite ; by H. A. Ward 316 



XXXIII. — Use of a Rotating Cathode in the Electrolytic 

 Determination of the Metals ; by F. A. Gooch and H. 

 E. Medway 320 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics — Qualitative Separation of Arsenic, Antimony and 

 Tin, J. Walker : Arsenic Pentachloride, Baskerville and Bennett, 324. 

 Electrolytic Peroxides of Lead, Nickel and Bismuth, Hollard : Peculiar 

 Double Salt of Silver Iodide, Stromholm, 325. — Method for the Determina- 

 tion of Carbon in Steel, G. W. Sargent : Physical Chemistry for Physi- 

 cians and Biologists, E. Cohen : Bunsen Flame of Radium, C. Runge and 

 J. Precht : Interference of Light by means of a Plane-parallel Plate, O. 

 Lummer and E. Gehrcke, 326. — Electricity carried by a Gaseous Ion, 

 J. J. Thomson : Potential Distribution in the dark Cathode Space, A. 

 Wehnelt : Mechanics, Molecular Physics and Heat, R. A. Millikan : 

 American Physical Society : A B C of Photo-Microgrophy, W. H. Walms- 

 ley, 327. 



Geology and Natural History— United States Geological Survey, 328. — Report 

 of the State Geologist of Vermont for 1901-1902, G. H. Perkins, 329.— 

 Report on the Geology of Louisiana, G. D. Harris : Tables of Minerals, 

 S. L. Penfield : Ueber Urausscheidunge.n in rheinischen Basalten, F. 

 Zirkel, 330. — Princeton University Expedition to Patagonia, J. B. 

 Hatcher : Argentino-Chilian Boundary ; Argentine Evidence, 331. — Ber- 

 muda Islands ; their Scenery, Climate, Productions, Physiography, 

 Natural History, and Geology ; with sketches of their Early History and 

 the Changes Due to Man, A. E. Verrill, 332. — Zoology of the Bermudas, 

 A. E. Verrill : West Indian Madreporarian Polyps, J. E. Duerden : Coral 

 Reefs of the Tropical Pacific, A. Agassiz, 333. — Index Animalium, C. D. 

 Sherborn : Andrews's Botany all the Year Round, E. F. Andrews, 334. 



Obituary — William Harkness, 334. 



