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IV CONTENTS. 



Page 

 XI. A Revision of the Genus Flaveria. By J. R. Johnston . . . 277 



XII. On the Lines of Certain Classes of Solenoidal or Lamellar 

 Vectors, Symmetrical with Respect to an Axis. By B. O. 

 Peihce 293 



XIII. On the Real A isomorphic Linear Transformation of a Real 

 Bilinear Form. By Henry Taber 305 



XIV. Influence of Occluded Hydrogen on the Electrical Resista?ice of 

 Palladium- By W. E. McElfresh 321 



XV. Experiments on the Deflations of Falling Bodies. By Edwin 



II. Hall 337 



XVI. On the Relation of the Hall Effect to the Current Density in Gold. 



By Thomas C. McKay 351 



XVII. On Generalized Space Differentiation of the Second Order. By 



B. O. Peirce 375 



XVIII. On the Cooper Hewitt Mercury Interrupter. By George W. 



Pierce 387 



XIX. Edge Corrections in the Calculation of the Absolute Capacity of 



Condensers. By J. G. Coffin 413 



XX. Metabolism and Division in Protozoa. By Amos W. Peters . 439 



XXI. Spectra from the Wehnelt Interrupter. By Harry W. Morse 517 



XXII. Studies on the Transformations of Saturnian Moths, with Notes on 

 the Life-History and Ajffinities of Brahmaea japonica. By 

 Alpheus S. Packard 545 



XXIII. The Significance of Changing Atomic Volume. IV. — The Effects 

 of Chemical and Cohesive Internal Pressure. By Theodore 

 William Richards 579 



Records of Meetings 007 



Report of the Council G27 



