REPORT OF THE SECRETARY. 133 



1250. A Century's Progress of the Steam Engine. By Dr. R. H. Tlmrs- 

 ton. From the Smithsonian Report for 1899, pages 591-603. Washington: 

 Government Printing Otiice, 1901. Octavo. 



1251. Bunsen Memorial Lecture. By Sir Henry Roscoe. From the 

 Smithsonian Report for 1899, pages 605^644, with Plates I-VII. Wash- 

 ington: Government Printing Office, 1901. Octavo. 



12.55. Report of S. P. Langley, Secretary of the Smith.sonian Institu- 

 tion, for the Year ending June 30, 1900, pages 1-117, with Plates I-XVIII. 

 Washington: Government Printing Office, 1900. Octavo. 



1261. Journal of Proceedings of the Board of Regents of the Smith- 

 sonian Institution, Report of Executive Committee, Act*; and Resolutions 

 of Congress. From the Smithsonian Report for 1900, pages xi-lxv. 

 Octavo pamphlet. 



1262. Progress in Astronomy during the Nineteenth Century. By Sir 

 Xorman Lockyer. From the Smithsonian Report for 1900, pages 123-147. 

 Washington: Government Printing Office, 1901. Octavo. 



1263. A Preliminary Account of the Solar Eclipse of 3Iay 28, 1900, as 

 observed by the Smithsonian Expedition. By S. P. Langley. From the 

 Smithsonian Report for 1900, pages 149-156, with Plates I-IV. Washing- 

 ton: Government Printing Office, 1901. Octavo. 



1264. Notes on Mars. By Sir Robert Ball and others. From the 

 Smithsonian Report for 1900, pages 157-172. Washington: Government 

 Printing Office, 1901. Octavo. 



1265. On Solar Changes of Temperature and Variations in Rainfall in 

 the Region Surrounding the Indian Ocean. By Sir Xorman Lockyer. 

 From the Smithsonian Report for 1900, pages 173-184, with Plates I, II. 

 Washington: Government Printing Office, 1901. Octavo. 



1266. The Pekin Observatory. From the Smithsonian Report for 1900, 

 pages 185-186, with Plates I-IV. Washington: Government Printing 

 Office, 1901. Octavo. 



1267. The Progress of Aeronautics. By M. Jan.*sen. From the Smith- 

 sonian Report for 1900, pages 187-193. ^^'ashington: Government Print- 

 ing Office, 1901. Octavo. 



1268. Lord Rayleigh on " Flight." From the Smithsonian Report for 

 1900, pages 195-196. Washington: Government Printing Office, 1901. 

 Octavo. 



1269. The Langley Aerodrome. From the Smithsonian Report for 

 1900, pages 197-216, with Plates I-\'I. Washington: Government Print- 

 ing Office, 1901. Octavo. 



1270. The Zeppelin Air Ship. By Thomas E. Curtis. [James Walter 

 Smith.] From the Smithsonian Report for 1900, pages 217-222, with 

 Plates I-VI. Washington: Government Printing Office, 1901. Octavo. 



1271. The L'se of Kites to Obtain Meteorological Observations. By A. 

 Lawrence Rotch. From the Smithsonian Report lor 1900, images 223-231, 

 with Plates I-llI. Washington: Government Printing Office, 1901. 

 Octavo. 



1272. Progress in Chemistry in the Nineteenth Century. By Prof. 

 AVilliam Ramsay. From the Smithsonian Report for 1900, pages 233-257. 

 Washington: Government Printing Office, 1901. Octavo. 



