1^ CONTENTS. 



Page 

 XIV. False Spectra from the Rotvland Concave Grating. By 



Theodore Lyman 239 



XV. Investigations on the Composition of Petroleum. By Charles 

 F. Mabery 



1. On the Composition oj California Petroleum. By Charles 



F. Mabery and Edward J. Hudson 



2. On the Chlorine Derivatives of the Hydrocarbons in Cali- 



fornia Petroleum. By Charles F. Mabery and 

 Otto J. Sieplein 



3. On the Composition of Japanese Petroleum. By Charles 



F. Mabery and Shinichi Takano 253 



XVI. The Eclipse Cyclone and the Diurnal Cyclones. Results of 



Meteorological Observations in the Solar Eclipse of May 28, 

 1900. By H. Helm Clayton ,305 



XVII. An Ajyparatus for Recording Alternating Current Waves. By 



Frank A. Laws 319 



XVIII. Suggestion concerning the Nomenclature of Heat Capacity. 



By Theodore William Richards 325 



XIX. Symmetrical Triiodbenzol. By C. Loring Jackson and G. 



E. Behr 331 



XX. A Study of Groiving Crystals by Instantaneous Photomi- 

 crography. By Theodore William Richards and 

 Ebenezer Henry Archibald . 339 



XXI. Design as a Science. By Denman W. Ross 355 



XXII. The Occlusion of Magnesic Oxalate by Calcic Oxalate, and the 

 Solubility of Calcic Oxalate. By Theodore W. Rich- 

 ards, Charles F. McCaffrey, and Harold Bisbee 375 



XXIII. Preliminary Diagnoses of Neiv Species of Laboulbeniaceae — 



///. By Roland Thaxter 395 



XXIV. A Study of Variation in the Fiddler Crab, Gelasimus pugilator 



Latr. By Robert M. Yerkes 415 



XXV. The Development and Function of Reissner\<i Fibre, and its 



Cellular Connections. By Porter Edward Sargent . 443 



XXVI. 1. Synopsis of the Genus Melampod in in. 



2. Synopsis of the Genus Nocca. 



3. New Species and Newly Noted Synonymy among the Sper- 



matophytes of Mexico and Central America. By B. L. 

 Robinson 453 



• 



