Miscellaneous Intelligence. 337 



Washington was selected as the place of meeting in August, 

 1891. The officers elected were as follows : President, Albert 

 B. Prescott of Ann Arbor. Vice-presidents of the Sections, E. 

 ' W. Hyde, Mathematics and Astronomy; F. E. Nipher, Physics; 

 R. C. Kedzie, Chemistry ; Thomas Gbey, Mechanical Science 

 and Engineering ; J. J. Stevenson, Geography and Geology ; 

 J. M. Coulter, Biology; J. Jastbow, Anthropology; S. Dana 

 Horton, Economic Science and Statistics. 



The American Committee of the International Congress of 

 Geologists, appointed by the American Association, as explained 

 on page 166 of this volume, was discharged. 



Sections A, Mathematics and Astronomy, and B, Physics. 



E. H. Moore: The Problem, to circumscribe about a conic a triangle which 

 shall be inscribed in a triangle which is itself inscribed in the conie, and a certain ' 

 question concerning two binary cubics, 



J. D. Warner : A method of testing for primes. 



J. A. Brashear: Recent photographs of the moon by direct enlargement. 

 The great Lick Spectroscope. Recent studies in the ultra-violet spectrum. A 

 new self-regulating photometer. 



Frank H. Bigelow: Further study of the solar corona. Terrestrial magnetism. 



C. H. Rockwell: Some personal experiences on the expedition to Cayenne, 

 French Guinea, to observe the eclipse of 22d Dec, 1889. 



Cleveland Abbe: Some results of observations made during the recent TJ. S. 

 expedition to the west coast of Africa. Aberration methods of determining the 

 altitudes and motions of the clouds. The marine nephoscope. 



E. D. Preston: Magnetic and gravity observations on the west coast of Africa 

 and at some islands in the Atlantic. 



R. S. Woodward: The effects of the atmosphere and oceans on the secular 

 cooling of the earth. 



Thomas Gray: Earthquake and volcanic action in Japan. A new transmission 

 dynanometer. Exhibition of seismograph. 



T. C. Mendenhall : Use of the magnetograph as a seismoscope. New metric 

 standards. 



T. Russell : Prediction of cold waves from Signal Service weather maps. 



F. E. Nipher : Surface integrals in meteorology. Method of measuring the 

 electrical resistance of liquids. 



J. Trowbridge and W C. Sabine : Electrical oscillations in air. 



A. E. Dolbear: On maximum temperatures. 



E. W. Morley : Determination of the tension of the vapor of mercury at ordi- 

 nary temperatures. 



0. T. Sherman : Exhibition of Verns' photographs in natural colors. 



E. W. Morley and H. T. Eddy: Report on the velocity of light in a mag- 

 netic field. 



Wm. A. Rogers: Description of the equal-temperature room in the observa- 

 tory and physical laboratory of Colby University. Is thermometry an exact sci- 

 ence? Exhibition of a combined meter with subdivisions to 2mm. and a yard 

 subdivided to tenths of inches, both being standards at 62 deg. Experimental 

 determination of the time required for water to pass from 4 2° to 72° in a constant 

 air temperature. Evaporation as a distributing agent in a determination of the 

 temperature of water. Experimental determination of the rate of change in un- 

 derground temperatures at a depth of nine feet by means of a flow of water at a 

 constant level. 



E. L. Nichols and B. W. Snow : Radiation at a red heat ; preliminary note 

 on the radiation from zinc oxide. 



Eli W. Blake : Exhibition of plans and sketch of the new physical laboratory. 

 "Wilson Hall," of Brown University, Providence, R. I. 



