II 



b. Long exposure plates of circiimpolar stars made for 

 Prof. H. Jacoby at Helsinfors. 



4. Exhibit by Warner & Swasey, of Cleveland, Ohio. 



a. Position Micrometer for the 40-inch Equatorial of the 

 Yerkes Observatory of the University of Chicago. 



b. Eye end Micrometer of the 6-inch Meridian Circle for 

 the U. S. Naval Observatory. 



c. Micrometer for 4-inch Meridian Circle for University of 

 Pennsylvania. 



d. Graduated Circle together with verniers of the 4-inch Me- 

 ridian Instrument of the University of Pennsylvania — this 

 circle was graduated on Warner & Swasey 's new engine. 



e. Several Photographs of Astronomical Work. 



5. Exhibit by Prof. Alfred G. Compton, Department of 



Applied Mathematics, The College of the City 

 of New York. 



a. Electro-gyroscope to illustrate precession. 



b. Artificial Horizon, designed to diminish the effect of 

 tremors. 



6. Exhibit by Prof. E. E. Barnard, of Yerkes Observa- 



tory of University of Chicago. 

 a. Several prints from photographs of stars, etc. 



7. Exhibit from Lowell Observatory, Mexico. 



a. Drawings and photographs of Mars, Venus, Mercury, 

 and Jupiter's satellites. 



b. Double star orbits and list of new double stars discovered 

 by T. J. J. See. 



c 



BOTANY. 



In Charge of Lucien M. Underwood. 

 I. Specimens of some New and Little Known Plants of 

 Eastern North America. Exhibited by Prof. N. L. 

 Britton. 



