364 Scientific Intelligence. 



A. E. Douglass: Summary of planetary work at the Lowell Observatory. 

 Lewis Swift: Astronomy in Southern California. 



F. W. Coar: Description of instantaneous azimuth and altitude charts of the 

 heavens. 



W. Maxwell Reed: * Instruction in Elementary AstroDomy by means of 

 observations made by the student. 



Truman H. Safford: Personal equations during the past century. 



Artemus Martin: Rational right-angled triangles. 



J. Woodbridge Davis: Behavior of the atmospheres of gas- and vapor-gen- 

 erating globes in celestial space. 



Ellen Hayes : Graphical Logic. 



Frank H. Loud: Illustrations of the comitant method of constructing the 

 imaginary loci of Analytical Geometry, so as to render their properties evident to 

 the eye. 



R. S. Woodward : The mass and moments of inertia of the earth's atmo- 

 sphere. Two new forms of apparatus for measuring the acceleration of gravity. 

 The gravitation constant and the mean density of the earth. 



G. A. Miller: The operation groups of Order 48 and those of Order 2p 8 , p 

 being any prime number. 



G. W. Hough: The condition of the surface of the Planet Jupiter. 



Geo. E. Hale : The Yerkes Observatory and its work. 



Edgar Odell Lovett : General theory of anharmonics. 



E. D. Preston : Fifty years of American Geodesy. 



William Eimbeck: The duplex base apparatus of the U. S. Coast and Geo- 

 detic Survey. Diminution of the refraction of the atmosphere with height and 

 its effect upon trigonometrically determined elevations from reciprocal zenith dis- 

 tances. 



Alexander Macfarlane : On the aims of the International Society for the 

 Promotion of Quaternions and allied branches. 



S. Edward Warren: Some notes on "direction." 



Franklin A. Becher: A short method for deriving Riemann's Theta formula. 



L. E. Dickson: A ternary and a quaternary linear congruence group simply 

 isomorphic to the linear fractional congruence group. 



A. S. Hathaway : Linear transformations in four dimensions. 



John S. Hayford : The limitations of the present solution of the tidal prob- 

 lem. 



J. K. Rees, Harold Jacoby, and Dr. H. S. Davis: Variation of latitude at New 

 York City and the constant of aberration from observations with a zenith tele- 

 scope at Columbia University Observatory, 1892-1898. 



George A. Hill: Description of the altazimuth instrument recently con- 

 structed for the U. S. Naval Observatory. 



David P. Todd : New application of the prismatic camera to total eclipse. 



Rollin A. Harris: On harmonic functions. A proposed tidal analyzer. A 

 tidal abacus. The harmonic analysis of high and low waters. 



Ernest W. Brown : Report on the recent progress in the dynamics of solids 

 and fluids. 



Henry S. White: Report on theory of invariants: the chief contributions of 

 a decade. 



Arthur G. Webster: Report on the recent progress in the mathematical 

 theory of electricity and maguetisrri. 



G. A. Miller : Report on the modern group theory. 



Section B. Physies. 



E. H. Hall : The measurement of thermal conductivity in iron. 



L. A. Bauer : On energy and entropy. Second report on the magnetic sur- 

 vey of Maryland. 



Ernest Merritt: On the magnetic deflection of diffusely reflected cathode 

 rays. The resistance of iron wires for alternating currents of ordinary frequen- 

 cies. 



Ernest Merritt and 0. M. Stewart : On the electrical properties of the 

 vapor from the arc. 



E. L. Nichols: The heat of fusion of ice determined in electrical units. 



A. M. Thiessen: The hysteresis of iron and steel at ordinary temperatures and 

 at the temperature of solid carbon dioxide. 



