PROCEEDINGS 



OF THE 



AMERICAN PHILOSOPHICAL SOCIETY 



HELD AT PHILADELPHIA 

 FOR PROMOTING USEFUL KNOWLEDGE 



Vol. XLVL January-March, 1907. No. 185. 



CONTENTS. 



Stated Meeting, January 4 i 



The Geology of the San Francisco Peninsula. By Roderic Crandall, 3 

 The Cathodic Precipitation of Carbon. By William Blum and Edgar 



F. Smith 59 



Stated Meeting, January 18 62 



Stated Meeting, February i 63 



Stated Meeting, February 75 63 



Stated Meeting, March i 64 



Stated Meeting, March /j 64 



Stated Meeting, April j 65 



General Me eti7tg, April 18-20 65 



On Distribution of Nuclei in Dust-free Wet Air, and on Methods of Ob- 

 servation. By C. Barus 70 



The Narratives of the Walking on the Sea. By William A. Lam- 



BERTON 8q 



The Early French Members of the American Philosophical Society. By 



J. G. ROSENGARTEN 87 



The Effect of Imperceptible Shadows on the Judgment of Distance. By 



Edward Bradford Titchener and William Henry Pyle 94 



Note as to the Measurement of the Action of Water upon Metals. By 



William Pitt Mason no 



Production of Synthetic Alcohol. By H. W. Wiley and Herman 



ScHREiBER - 117 



The Progress of the Isthmian Canal. By Elihu Thomson 124 



The Association Theory of Solutions. By William Francis Magie... 138 

 The Groups which are Generated by two Operators of Orders Two and 



Four Respectively whose Commutator is of Order Two. By G. A. 



Miller 146 



Jonah's Whale. By Paul Haupt .• 151 



Comparison of Latitude Observations at Sayre Observatory, South Beth- 

 lehem, and at Flower Observatory, Philadelphia. By John H. 



Ogburn 165 



Transportation in the United States. By Lewis M. Haupt 171 



The Princeton University Archaeological Expedition to Syria. By 



Howard Crosby Butler 182 



A Preliminary Study of some Modern Micrometers. By Marshall D. 



Ewell ■ 187 



Biographical Notice of Albert Henry Smyth. By Joseph G. Rosen- 



garten i 



1 — — =^ 



\Jr PHILADELPHIA 



THE AMERICAN PHILOSOPHICAL SOCIETY 



104 South Fifth Street 

 1907 



