REPOKT OF THE SECRETARY. 131 



IV. SEPARATES FKd.M SMITHSONIAN REPORTS. 



1221. Journal of Proceedings of the Board of Regents of the Smith- 

 sonian Institution, report of executive committee, acts and resoUitions of 

 Congress. From the Smithsonian Report for 1899, pages xl-lxiii. Wash- 

 ington: Government Printing Office, 1901. Octavo. 



1222. The AVave Tlieory of Light. By A. Cornu. From the Smiths( mian 

 Report for 1899, pages 93-105. Washington: Government Printing <;)tlice, 

 1901. Octavo. 



1223. The IMotion of a Perfect Liquid. By Prof. H. S. Hele-Shaw. 

 From the Smithsonian Report for 1899, pages 107-118, with Plates I-IV. 

 Washington: Government Printing Office, 1901. Octavo. 



1224. The Field of Experimental Research. By Elihu Thomson. From 

 the Smithsonian Report for 1899, pages 119-130. Washington: Govern- 

 ment Printing Office, 1901. Octavo. 



1225. Liquid Hydrogen. By Professor Dewar. From the Smithsonian 

 Report for 1899, pages 131-142, with Plates I, II. Washington: Govern- 

 ment Printing Office, 1901. Octavo. 



1226. Some of the Latest Achievements of Science. By Sir William 

 Crookes. From the Smithsonian Report for 1899, pages 143-153. Wash- 

 ington: Government Printing Office, 1901. Octavo. 



1227. An Experimental Study of Radio-Active Substances. By Henry 

 Carrington Bolton. From the Smithsonian Report for 1899, jaages 155-162. 

 Washington: Government Printing Office, 1901. Octavo. 



1228. The Growth of Science in the Nineteenth Century. By Sir 

 ]\lichael Foster. From the Smithsonian Report for 1899, pages 163-183. 

 Washington: Government Printing Office, 1901. Octavo. 



1229. Sir William Crookes on Psychical Research. From the Smith- 

 sonian Report for 1899, pages 185-205. Washington: Government Print- 

 ing Office, 1901. Octavo. 



1230. Survey of that Part of the Range of Nature's Operations which 

 Man is Competent to Study. By G. Johnstone Stoney. From the Smith- 

 sonian Report for 1899, pages 207-222, with figures. Washington: Govern- 

 ment Printing Office, 1901. Octavo. 



1231. On Lord Kelvin's Address on the Age of the Earth as an Abode 

 Fitted for Life. By Prof. T. C. Chamberlain. From the Smithsonian 

 Report for 1899, pages 223-246. Washington: Government Printing Office, 

 1901. Octavo. 



1232. An Estimate of the Geological Age of the Earth. By J. Joly. 

 From the Smithsonian Report for 1899, pages 247-288. Washington: 

 Government Printing Office, 1901. Octavo. 



1233. The Petrified Forests of Arizona. By Lester F. \\'ard. From 

 the Smithsonian Report for 1899, pages 289-307, with Plates I-III. Wash- 

 ington: Government Printing Office, 1901. Octavo. 



1234. Present Condition of the Floor of the Ocean: Evolution of the 

 Continental and Oceanic Areas. By Sir John INIurray. From the Smith- 

 sonian Report for 1899, pages 309-328. AVashington: Government Print- 

 ing Office, 1901. Octavo. 



1235. Relation of Motion in Animals and Plants to tlie Electrical Phe- 



