M^^S 



PROCEEDINGS 



OF THE 



American Philosophical Society 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 



Vol. XLIX. July, 1910. No. 195. 



CONTENTS. 



The Influence of Mental and Muscular Work on Nutritive Processes. By 



Francis G. Benedict , 145 



The Tunnel Construction of the Hudson and Manhattan Railroad Company. 



By John Vipond Da vies 164 



A Brain of about One-half the Average Weight from an Intelligent White 



Man. By B. G. Wilder 188 



Dermal Bones of Paramylodon from the Asphaltum Deposits of Rancho la 



Brea, near Los Angeles, California. By William J. Sinclair 191 



The Restored Skeleton of Leptauchenia decora. By William J. Sinclair.... 196 



Antarctic Geology and Polar Climates. By William M. Davis 200 



The Propagation of Explosions in Mixtures of Petroleum Vapor with Air in 



Tubes. By Charles E. Munroe 203 



Results of Recent Researches in Cosmical Evolution. By T. J. J. See 207 



The Existence of Planets About the Fixed Stars. By T. J. J. See 222 



On the Distances of Red Stars. By Henry N. Russell 230 



Species in Agave. By William Trelease 231 



Groups Generated by Two Operators Each of which Transforms the Square 



of the Other into a Power of Itself. By G. A. Miller 238 



The Great Japanese Embassy of i860. By Patterson Dubois 243 



Obituary Notices of Members Deceased / 



Simon Newcomb, F.R.S. LL.D., D.C.L Hi 



PHILADELPHIA 

 THE AMERICAN PHILOSOPHICAL SOCIETY 



104 South Fifth Street 

 1910 



