X Contents. 



BY ARTIIUK M. ELLIOTT. 



An Apparatus for Rapid Gas- Analysis, (with Plates XXII and 



XXIII) 372 



BY LAUllENCE JOHNSON. 



The Parallel Drift-Hills of Western New York, (with Plate XVIII). 249 



BY OEOKGE N. LAWKENCE. 



Description of a New Species of Bird of the Genus Chceiwa, with 



Notes on two other little-known Birds 245 



Description of two New Species of Birds from Yucatan, of the Fami- 

 lies Columbidce and Formicarida; 287 



Description of a New Species of Bird of the Family Cypselidte 355 



Descriptions of New Species of Birds of the Genera Chrysotis, Formi- 



civora. and Spermophila 384 



BY'^ ALBEUT K. LEEDS. 



On the Production of Peroxide of Hydrogen, as well as of Ozone, by 



the Action of Moist Phosphorus upon Air (with Plate I' 22 



BY JOHN S. NEWBEEKY. 



The Origin and Relations of the Carbon Minerals 267 



On the Origin of the Carbonaceous Matter present in Bituminous 



Shales, 357 



BY" JOHN K. EEES. 



Observations on the Transit of Venus, December, 1882 384 



BY ISKAEL C. RUSSELL. 



The Geology of Hudson County, New Jersey (with Plate II) 27 



