CONTENTS. 



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 I. The Possible Significance of Changing Atomic Volume. By 



Theodore William Richards 1 



II. Preliminary Diagnoses of Neiv Species of Laboulbeniacae. — IV. 



By Roland Thaxter 19 



III. The Law of Physico- Chemical Change. By Gilbert Newton 



Lewis 47 



IV. The Visible Radiation from Carbon. By Edward L. Nichols . 71 

 V. On Ruled Loci in n-Fold Space. By Halcott C. Moreno . 119 



VI. The Arc Spectrum of Hydrogen. By O. II. Basquin .... 159 



VII. The Standard of Atomic Weights. By Theodore William 



Richards 175 



VIII. Stuilies on the Reactions of Limax maximus to Directive Stimuli. 



By Peter Frandsen 183 



IX. The Algae of Jamaica. By Frank Shipley Collins . . . 229 



X. Modifications of HempeVs Gas-Apparatus. By Theodore Wil- 

 liam Richards 271 



XI. The Parametric Representation of the Neighborhoo<l of a Singular 



Point of an Analytic Surface. By C. W. M. Black . . . 279 



XII. A Preliminary Enumeration of the Sorophorcae, By Edgar W. 



Olive 331 



XIII. The Decomposition of Mercurous Chloride by Dissolved Chlorides : 



A Contribution to the Study of Concentrated Solutions. By 

 Theodore William Richards and Ebenezer Henry 

 Archibald 345 



XIV. A New Investigation Concerning the Atomic Weight of Uranium. 



By Theodore William Richards and Benjamin Shores 

 Merigold .... 363 



XV. The Significance of Changing Atomic Volume. II. — The Prob- 

 able Source of the Heat of Chemical Combination, and a New 

 Atomic Hypothesis. By Theodore William Richards . ;>!»7 



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