VI CONTENTS. 



PAOB 



AKTHUR H. ELLIOTT. 



Contributions of Organic Chemistry to Modern Medicine 101 



ARTHUR HOLLICK. 



A Memorial of the late Dr. John I. Northrop 9 



The Palaeontology of the Cretaceous Formation on Staten Island 96 



OLIVER p. HUBBARD. 



Notes on the Discovery of Chloroform 149 



HAROLD JACOBY. 



On the Reduction of Transit Observations by Least Squares 35 



The Rutherfurd Photographic Measures of the Group of the Pleiades... 41 



Report upon the Meeting of the National Academy of Sciences 41 



The Rutherfurd Photographic Measures of the Stars about B Cygni 120 



JAMES F. KEMP. 



The ElaeoHte Syenite near Beemerville, Sussex County, N. J 60 



Petrographical Notes 126 



JAMES F. KEMP AND V. F. MARSTERS. 



The Trap Dikes in the Lake Champlain Valley and the Neighboring 



Adirondacks 13 



GEORGE F. KUNZ. 



Some Observations on the Opal Mines of Hungary and the Occurrence 



of Opal in Washington and Oregon 32 



On the Origin of Garnets and Associated Minerals in the Garnet Dis- 

 trict of Bohemia and Saxony 32 



Notes on the Minerals, Gems, and Ethnology of the Ural Mountains, 



as Observed during a Recent Trip 119 



L. H. LAUDY. 



Recent Researches on the Solar Spectrum 125 



J. T. MONELL AND C. R. MANN. 



Transit Factors for the Observatory of Columbia College 41 



HENRY F. OSBORN. 



The Evolution of the Horse 107 



CHARLES S. PU08SKR. 



Notes on the Geology of Skuunemunk Mountain, Orange County, N. J. 132 



