CONTENTS 



Page 



The Evolution of Commerce : Annual Address by the President, 



Gardiner G. Hubbard 1 



Studies of Muir Glacier, Alaska ; by Harry Fielding Reid 19 



Supplement I — Notes on the Geology of the Vicinity of Muir 



Glacier ; by H. P. Gushing. 56 



Supplement II — Notes on some Eruptive Rocks from Alaska ; 



by George PI. Williams 63 



Supplement III — Microscopical Examination of Wood from 

 the Buried Forest, Muir Inlet ; by Francis 



H. Herrick 75 



Appendix I — List of Plants collected near Muir Glacier ; 



determined by W. W. Rowlee 79 



Appendix II — Meteorologic Observations 80 



Appendix HI — Magnetic Observations 82 



Appendix IV — Suggestions to future Observators 83 



Geography of the Air: Annual Report by Vice-President General 



A. W. Greely 85 



The Mother Maps of the United States ; by Henry Gannett 101 



An Expedition through the Yukon District ; by C. W. Hayes 117 



Appendix — Cryptogams collected by Dr C. Willard Hayes in 



Alaska, 1891 ; by Clara E. Cummings 160 



The North American Deserts ; by Johannes Walther 163 



The Alaskan Boundary Survey : 



I — Introduction ; by T. C. Mendenhall 177 



II— The Boundary south of Fort Yukon ; by J. E. McGrath . 181 

 III — The Boundary north of Fort Yukon ; by J. Henry 



Turner 189 



Collinson's Arctic Journey ; by General A. W. Greely 198 



Notes — Topographic Survey of Canada 201 



Lieutenant Peary's Crossing of northern Greenland 202 



Geographic Prizes 206 



Index to Volume IV 209 



Title-page and Imprimatur i 



Contents and Illustrations iii 



Publications of the National Geographic Society v 



Fourth Annual Report of the Secretaries vii 



Fourth Annual Report of the Treasurer x 



Report of the Auditing Committee xii 



Proceedings of the National Geographic Society xiii 



Fifth Annual Report of the Secretaries xx 



Fifth Annual Report of the Treasurer xxii 



Report of the Auditing Committee xxiv 



(iii) 



