714 



SCIENCE. 



[N. S. Vol. II. No. 48. 



Oberbeck's general circulation. Helmholtz' 

 horizontal rolls. The investigations of Diro 

 Kitao, Guldberg and Mohn, Marcbi, Bons- 

 sinesq, A. Poincare, Sprung, Siemens, Moel- 

 ler, Ekholm, Ritter, Lindeloff, Margules and 

 Hermann into the motions of the atmos- 

 phere. Viscosity and discontinuity. The 

 possible special solutions of the general 

 equations of fluid motions that apply to the 

 true atmospheric circulation, both on the 

 earth and on the other planets. Atmos- 

 pheric tides ; theories of Laplace, Ferrel, 

 Kayleigh, Margules, A. Poincare. Theories 

 of atmospheric electricity. 



Time. — Eighty lectures and an additional 

 four hours a week given to special reading 

 and investigation and to the preparation of 

 the final thesis, as closing the four years' 

 course. 



Concomitant Studies. — Niemann's Differen- 

 tial Gleichiingen : Anerhsich' s Sydrodynamics ; 

 Lamb's Hydrodynamics (new edition) ; phys- 

 ical laboratory work in gaseous motions, 

 optical and electrical phenomena. 



THE METEOROLOGICAL LABORATORY. 



In order to carry out an ideal course in 

 meteorology it is necessary to not merely 

 study lectures and text-books but the 

 current daily weather maps; to practice 

 the use of instruments and to keep weather 

 records; to investigate special questions in 

 local climatology, and to personally explore 

 the atmosphere. 



In the meteorological laboratory the stu- 

 dent should investigate experimentally 

 questions that arise in relation to the mo- 

 tions of the atmosphere, which includes al- 

 most every pertinent form of experiment in 

 the motions of fluids and gases. Provision 

 should also be made for the studj"^ of such 

 optical phenomena of the atmosphere as re- 

 fraction, absorption, interference, scintilla- 

 tion, mirage, and sunset colors. 



This laboratory should also provide for 

 study and practice with self-registers, the 



study of the thermo-dynamics of the air 

 and aqueous vapor; the determination of 

 the amount of heat received from the sun; 

 the continuous records of atmospheric elec- 

 tricity, terrestrial magnetism, earth cur- 

 rents, the tides and earthquakes. 



The laboratory should also provide 

 mathematical apparatus or mechanical de- 

 vices by which complex questions in the 

 motion of the atmosphere may be solved. 



Facilities should be given for the study 

 of atmospheric dust, especially in its rela- 

 tion to the temperature of the air and to 

 the formation of clouds and rain. 



The laboratory should contain a working 



library and bibliography. 



Cleveland Abbe. 

 Washington, D. C. 



GEOLOGIC ATLAS OF THE UNITED STATES. 

 FOLIO 1, LIVINGSTON, MONTANA, 1894. 



This folio consists of 3J pages of text, a» 

 topographic sheet (scale 1:250,000), a sheet 

 of areal geology, one of economic geology, 

 one of structure sections, and one of giving 

 a columnar section. The text is signed by 

 Joseph P. Iddings and Walter H. Weed, 

 geologists, and Arnold Hague, geologist in 

 charge. 



The area of country covered by the folio 

 lies between the parallels of latitude 45 and 

 46 and the meridians 110 and 111, and em- 

 braces 3,340 square miles. It is within the 

 State of Montana, including portions of 

 Gallatin and Park counties, and the town 

 of Livingston is within its limits. The 

 region is elevated, the lowest point being 

 over 4,000 feet, the major portion over 6,000 

 feet, and the highest peaks over 11,000 feet 

 above sea level. 



The principal topographic features are the 

 Snowy Mountains, Gallatin Range, Bridger 

 Range, Crazj' Mountains and Yellowstone 

 Valley. The Yellowstone River is the 

 main drainage channel for the area. It 

 enters the district from the Yellowstone 



