CONTENTS. 



Page 

 I. A Sttidy of the Greek Epigram before 300 B. C. By F. A. Gragg 1 



11. The Reactions of Earthoorms to Acids. By S. H. IIurwitz . 65 



III. The Magnitude of an Error tohich sometimes affects the Results of 



Magnetic Tests upon Iron and Steel Rings. By B. O. Peirce 83 



lY. Note on Kirchhoff's Laio. By G. C. Evans 95 



V. The Electromotive Eorce produced in Solutions by Centrifugal 



Action. By R. C. Tolman 107 



VI. Feeding Reactions of the Rose Coral (Isophyllia). By F. W. 



Carpenter 147 



VII. On Four-Dimensional Vector Analysis, and its Application in 



Electrical Theory. By G. N. Lewis 103 



VIII. The Resistivity of Hardened Cast Iron as a Measure of its Temper 

 and of its Fitness for use in Permanent Magnets. By B. O. 

 Peirce 183 



IX. The Magnetic Permeabilities at Low Excitations of Two Kinds of 



Very Pure Soft Iron. By B. O. Peirce 205 



X. A Revision of the Atomic Weight of Neodymium. First Paper — 

 The Analysis of Neodymium Chloride. By G. P. Baxter 

 and H. C. CHApm 213 



XI. (LIV.) On the Equilibrium of the System consisting of Calcium 

 Carbide, Calcium Cyanamide, Carbon, and Nitrogen. By M. D. 

 Thompson and R. H. Lombard 245 



XII. The Nature of Some Supposed Algal Coals. By E. C. Jef- 

 frey 271 



