CONTENTS. 



PAGE. 



Constitution of the Philosophical Society of Washington 5 



Standing Rules of the Society 7 



Standing Rules of the General Committee 11 



Rules for the Publication of the Bulletin 13 



List of Members of the Society 15 



Minutes of the 185th Meeting, October 9th, 1880. — Cleveland Abbe on the 



Aurora Borealis , 21 



Minutes of the 186th Meeting, October 25th, 1880. — Resolutions on the 

 decease of Prof. Benj. Peirce, with remarks thereon by Messrs. Alvord, 

 Elliott, Hilgard, Abbe, Goodfellow, and Newcomb. Lester F. Ward 

 on the Animal Population of the Globe 23 



Minutes of the 187th Meeting, November 6th, 1880. — Election of Officers 



of the Society. Tenth Annual Meeting 29 



Minutes of the 188th Meeting, November 20th, 1880. — John Jay Knox on 

 the Distribution of Loans in the Bank of France, the National Banks 

 of the United States, and the Imperial Bank of Germany. J. J. 

 Woodward on Riddell's Binocular Microscope. J. S. Billings on the 

 Work carried on under the direction of the National Board of Health, 30 



Minutes of the 189th Meeting, December 4th, 1880. — Annual Address of 

 the retiring President, Simon Newcomb, on the Relation of Scientific 

 Method to Social Progress. J. E. Hilgard on a Model of the Basin of 

 the Gulf of Mexico 39 



Minutes of the 190th Meeting, December iSth, 1880. — Swan M. Burnett on 

 Color Perception and Color Blindness. E. M. Gallaudet on the Inter- 

 national Convention of the Teachers of the Deaf and Dumb at Milan, 53 



Minutes of the 191st Meeting, January 8th, 18S1. — W. F. McK. Ritter on 

 a Simple Method of Deriving some Equations used in the Theory of 

 the Moon and Planets. Edgar Frisby on the Orbit of Swift's Comet. 56 



Minutes of the 193d Meeting, January 22d, 1881. — J. W. Chickering, Notes 

 on Roan Mountain, North Carolina. Lester F. Ward, Field and Closet 

 Notes on the Flora of Washington and Vicinity 60 



Minutes of the 193d Meeting, February 5th, 1881. — C. E. Dutton on the 



Scenery of the Grand Canon District 120 



Minutes of the 194th Meeting, February 19th, 1881. — J. E. Todd on the 

 Quaternary Deposits of Western Iowa and Eastern Nebraska. C. E. 

 Dutton on the Vermilion Cliffs of Southern Utah 120 



Minutes of the 195th Meeting, March 5th, 1881. — Theodore Gill on Princi- 

 ples of Morphology. Marcus Baker on the Boundary Line between 

 Alaska and Siberia 122 



III 



