492 CATALOGUE OF EXHIBITS. 



Arizona. Exhibited by A. E. Douglass, for Percival 

 Lowell, Director. 



3. Results of Observations with the Zenith Telescope of the 



Flower Astronomical Observatory of the University of 

 Pennsylvania. Exhibited by C. L. Doolittle, Director. 



4. a. Photographs of Stars, Star-clusters, and Nebulae by 



Isaac Roberts. 



b. Atlas Stellarum Variabilum, Series II, by J. G. 



Hagen, S. J. 



c. Other Recent Important Publications. Exhibited by 



the Columbia University Library. 



5. a. Graphical Representation of the Variation of Latitude 



at New York City during the past seven years. 



b. Atlas Photographique de la Lune, publie par I'Observa- 



toire de Paris ; planches du quatrieme fascicule, 1899- 



c. Carte Photographique du Ciel, Observatoire de Paris. 



d. Recent publications by members of the Department 



of Astronomy. Exhibited by the Columbia University 

 Observatory, J. K. Rees, Director ; New York City. 



6. Enlargement of the spectrum of a Cygni showing '* en- 



chanced lines." Exhibited by Sir Norman Lockyer, 

 Director Solar Physics Observatory, London. 



BOTANY. 



In Charge of D. T. MacDougal. 



I. Museum Methods Employed at the New York Botanical 

 Garden. 



a. Tube specimens. 



b. Exhibition microscopes. 



c. Photographs' 



d. Publications. 



