N CONTENTS. 



Paoe 

 XIV. False Spectra from the 11 owl a mi Concave Grating. By 



Thkodori Lvman 239 



XV. Investigation* on th> Composition of Petroleum. By Charles 

 1". M.\i;i i:V 



1. On the Composition oj California Petroleum. By Charles 



1 •'. Mabbry and Edward J. Hudson 



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



fornia Petroleum. By Charles F. Mabbry and 

 Otto J. Sieplein 

 8. On the Composition of Japanese Petroleum. By Charles 



F. Mai-.i ky AND Shinn hi 1 'aka.no 253 



XVI. The "Eclipse Cyclone and th< Diurnal Cyclones. Results of 



Meteorological Observations in the Solar Eclipse of May £8, 

 1900. I!y II. Hi i.m Clayton 305 



XVII. An Apparatus 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. Bbhb 331 



XX. A Study of Growing Crystals by Instantaneous Photomi- 

 crography. By Throdore William Richards and 

 Ebenkzbr Henry Archibald 339 



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



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

 Solubility of Calcic Oxalate. By Theodore W. Rich- 

 ards, Charles F. McCaffrey, ind Harold Bisbri 375 



XXIII. Preliminary Diagnoses of New Species of Laboulbeniaceae — 



///. By Roland Thaxter 395 



.IV. A Study of Variation in tht Fiddler Crab, Gelasimus pugilator 



Lair. l'-Y Roberi M. Xerkbs 415 



XXV. I'fi' Development and Function of Reismer't Filire, and its 



■/■ Connections. By Porter Edward Sargeni , 448 



XXVI. 1. Synop ( u Melampodium. 



2. Synoj oj Gt V ca. 



Voted Synonymy among the Sper- 

 mat op) Mexico < d ( ■ itral America. By B. L. 



153 



