OF THE SMITHSONIAN INSTITUTION. 45 



246. Smithsonian Contributions to Knowledge. Vol. XVIII. 1872. 4to., 

 pp. 646, 10 woodcuts, 5 plates, 3 charts. 



(.ONTENTS. 



ScHOTT, C. A. Tables of rain and snow. No. 222. 



Stockwell,, J. N. Secular variations of the orbits of planets. No. 232. 

 Hakknes.s, W. Observations on terrestrial magnetism. No. 239. 

 Ferrel, W. Converging series, expressing the ratio between the diame- 

 ter and the circumference of a circle. No. 233. 



247. Arrangement of the Families of Fishes, or Classes Pisces, Marsipo- 



branchii, and Leptocardii. By Theodore Gill. November, 1872. 

 8vo., pp. 96. (M. C. XI.) 



248. On the Geology of Lower Louisiana and the Salt Deposit on Petite 

 Anse Island. By Eugene W. Hilgard. June, 1872. 4to., pp. 38, 

 4 woodcuts, 2 plates. (S. C. xxiii.) 



249. Annual Report of the Board of Regents of the Smithsonian Institu- 

 tion, for the year 1871. 42d Congress, 1st Session. Senate Mis. Doc. 

 No. 149. 1873. 8vo., pp. 473, 3 woodcuts. ^ 



CONTENTS. 



Henry, J. Secretary's report of operations. 



Board of Eegents, Proceedings of 



List of meteorological stations and observers. 



Meteorological material contributed to Smithsonian Institution. 



Meteorological articles received by the Institution, and deposited in the 



Library of Congress. Auroras,- earthquakes, etc. 

 Dodge, N. S. Memoir of Sir John Frederick William Herschel. 

 Arago, M. Eulogy on Joseph Fourier. 

 Odling. "VV. Pi'ofossor Thomas Graham's scientilic work. 

 Helmholtz, H. On the relation of the physical sciences to science in 



general. 

 KoRNHUBER, G. A. Alternate generation and parthenogenesis in the 



animal kingdom. 

 Keichardt, W. Present state of our knowledge of cryptogamous plants. 

 Stockwell, J. N. Eecent researches on the secular variations of the 



planetary orbits. 

 De Forest, E. L. Methods of interpolation applicable to the graduation 



of irregular series, such as tables of mortalitj'. Part I. 

 De Saussure, H. lieport on the transactions of the Society of Physics 



and Natural History of Geneva, from July, 1870, to June, 1871. 

 Expedition toward the North Pole : 



Henry, J. ; Hilgard, J. E. ;>Newcomb, S. ; Baird, S. F.; Mekk, 

 F. B. ; Agassiz, L. Scientific instructions to Captain Hall. 

 Ethnology : 



Comfort, A. J. Indian mounds near Fort Wad>worth, Dakota. 



Bertuoud, E. L. Antiquities on the Cache la Poudre lliver, Weld 

 county, Colorado Territory. 



Lyon, W. B. Antiquities in New Mexico. 



