CONTENTS. VII 



NUMBER CLXXIX. 



Page 



Art. XLIII — Quantitative determination of Niobium ; by 



T. B. Osborne, 329 



XLIV. — Notes on the Surface Geology of the country border- 

 ing the Northern Pacific Railroad ; by J. S. Newberry, 337 



XLY. — Rainband Spectroscopy; by L. Bell, 347 



XLYI. — A new Genus of Chazy Sponges, Strephochetus; 



by H. M. Seely, 355 



XL VII. — William B. Rogers's Geology of the Virginias. 



A Review ; by J. L. and H. D. Campbell, 357 



XL VIII. — Displacement through intrusion; by J. D. Dana, 374 

 XLIX. — An Endoparasite of Noteus; by Sara G. Foulke,.' 377 

 L. — Spectrum of Nova Andromeda? ; by O. T. Sherman, 378 



SCIENTIFIC INTELLIGENCE. 



Chemistry and Physics. — Determination of the Specific Density of Liquids at 

 high temperatures, R. Schiff, 380. — Direct union of Bromine with Chlorides, 

 forming a new class of Perbromides, Berthelot : Reduction of Carbon dioxide 

 to monoxide by Carbon, Naumann and Pistor, 381. — Decomposition of Carbon 

 dioxide by the Electric Spark, Dixon and Lowe, 383. — Direct Synthesis of 

 Benzene Derivatives by the action of Potassium on Carbon monoxide, Nietzki 

 and Benckiser, 384. — Composition of Ocean water, W. Dittmar, 385. 



Geology and Mineralogy.— Development of Crystallization in Igneous rocks of 

 Washoe, Nevada, A. Hague and J. P. Iddings, 388. — Crystallographic Study 

 of the Thinolite from Lake Lahontan, E. S. Dana, 390. — Geology of the 

 Scottish Highlands, Judd, 392. — Results of the fusion of pyroxene and horn- 

 blende minerals, 395. — An effect near Merak, on western Java, of the Krakatoa 

 Eruption: Geological and Natural History Survey of Minnesota for 1884, 

 N. H. Winchell, 396. — Underground Temperatures, J. Prestwich, 397. — 

 Notes on the Stratigraphy of California, G. P. Becker, 399. — New American 

 Limuloid species from the Carboniferous, A. S. Packard : Embryology of 

 Limulus, A. S. Packard : Town Geology, the Lesson of the Philadelphia 

 Rocks. A. Heilprin, 401. — Einfiihrung in die Gesteinslehre, Ein Leitfaden fur 

 den akademischen Hnterricht und zum Selbststudium von A. v. Lasaulx: 

 Pyrargyrite and Proustite, E. Rethwisch : Marble Border of Western New 

 England: Die Meteoriten-Sammlung des k. k. mineralogischen Hof-Kabinetes 

 in Wien am 1. Mai 1885, von A. Brezina : Botany of the Challenger Expedi- 

 tion, 402. — Methods of Research in Microscopical Anatomy and Embryology, 

 C. 0. Whitman, 403. 



Astronomy.— The Star System 40, o' 2 Eridani, A. Hall, 403. — Report No. 8 of the 

 Cincinnati Observatory, H. C. Wilson, 404. 



Miscellaneous Scientific Intelligence. — Washington Co., Penn., Meteorite, G. P. 

 Ktjnz, 404. — British Association at Aberdeen, 405. — Louis Agassiz, his Life 

 and Character, E. C. Agassiz : Hawaian or Sandwich Island Survey, W. D. 

 Alexander, 406. — Obituary. — Jas. Macfarlane: Thos. Bland, 407. — E. H. 

 von Baumhauer, 408. 



