iv CONTENTS. 



Page 

 XII. Report of an Experiment to Detect the Fitzgerald-Lorentz Effect. 



By E. W. Moeley and D. C. Miller 319 



XIII. The Spermatogenesis of the Myriapods. (IV.) On the Karyo- 



sphere and Nucleolus in the Spermatocytes of Scolopendra Sub- 

 spinipes. By M. W. Blackman 329 



XIV. On the First Observations with Registration Balloons in America. 



By A. L. Rotch 345 



XV. On a Postulate Respecting a Certain Form of Deviation from the 



Straight Line in a Plane. By G. Hay 351 



XVI. Surface Tension at the Interface between Certain Liquids and 



Vapors. By A. L. Clark 359 



XVII. Titles of Articles on the Hall Effect, with the Titles of Some 

 Aiticles on the Related Phenomena since Discovered by Other 

 Investigators. By T. C. McKay 383 



XVIII. Galvanic Polarization on a Mercury Cathode. By G. N. Lewis 



and R. F. Jackson 397 



XIX. The Electrical Conductivity of Solutions in Liquid Iodine. By 



G. N. Lewis and P. Wheeler 417 



XX. The Transition Temperature of Sodic Bromide. A New Fixed 

 Point in Thermometry. By T. W. Richards and R. C. 

 Wells 433 



XXI. A Nero Method of Standardizing Thermometers below Q C. By 



T. W. Richards and F. G. Jackson 449 



XXII. A Method of Determining Thermal Conductivity. By F. A. 



Laws, F. L. Bishop, and P. McJunkin 455 



XXIII. On the Language of Vitruvius. By M. H. Morgan . . . 465 



XXIV. On the Manner of Groivth of a Current in the Coil of a Nearly- 



closed Electromagnet as Influenced by the Width of the Air 

 Gap. By B. O. Peirce 503 



XXV. On Thermo-Electric Heterogeneity in Certain Alloys, especially 

 German-Silver. By E. II. Hall, L. L. Campbell, and 

 S. B. Seuviss 541 



