PAGE 



yi CONTENTS. 



THOMAS L. CASEY. 



Coleopterological Notices, No. II. (title) 2 



FRANK M. CHAPMAN. 



The Origin of the Avefauna of the Bahamas 54 , 



HAROLD JACOBY. 



On the Calculation of Star Places for Zenith Telescope Observations 86 

 The United States Eclipse Expedition to West Africa, 1889-90 47 



A. A. JULIEN. 



On the Microbe of Phosphorescent Wood 37 



GEORGE F. KUNZ. 



The Discovery of Diamonds at Plum Creek, Rock Elm Township, 

 Pearce Co., Wis 49 



The Discovery of Fire Opals near Whelan, Wash .. 50 



The Phosphorescence of the Diamond after Exposure to Sunlight, 

 and also by Friction 50 



On some New and Interesting Occurrences of Minerals and Precious 

 Stones in the United States 56 



L. H. LAUDY. 



Adaptation of the Arc Light to Projections 103 



Electric Meters 118 



A. R. LEDODX. 



Notes on the Sweet Grass Hills of Montana and the Kootenai Mines 

 of British Columbia 57 



A. R. LEEDS. 



The Discovery of a Starch-digesting Ferment in Cow's Milk, and its 



Relation to Nutrition 66 



The Precipitation of Suspended Silt and Clay in River Waters 66 



W. GOOLD LEVISON. 



Note on an Economical Zinc Element for Bunsen Batteries 114 



Note on Photomicrographs from Photographs of Lightning 114 



J. S. NEWBERRY. 



On the Geological Age and Relations of the Potomac Group of Vir- 

 ginia and Maryland 36 



