464 CONTENTS. 



Page. 

 Ox THE Relation of the Physical Sciences to Science in General, by Dr. 



Herman Helinboltz 217 



Alternate Generation and Parthenogenesis in the Animal Kingdom. 



Lecture by Dr. G. A. Konibuber 234 



On the Present State of our Knowledge of Cryptogamous Pl.\kts. A 



lecture by Henry William Reicbardt 249 



Recent Researches on the Secular Variations of the Pl.vnetary Orbits, 



by John N. Stockwell 261 



On Some Methods of Interpolation Applicable to the Graduation of 



Irregular Series, sucb as tables of mortality, etc., by Erastus L. De Forest. 275 

 Report on the Transactions of the Society of Physics and Natural His- 

 tory OF Geneva, from June, 1870, to June, 1671, by Heniy De Saussuro 341 



Expedition toward the North Pole : 



Instructions to Captain Hall, by Hon. George M. Robeson, Secretary of 



the Navy 361 



Letter of Professor Joseph Henry, President of the National Academy of 

 Sciences, with instructions to Captain C. F. Hall for the scientitic opera- 

 tions of the expedition toward, the North Pole 364 



General directions in regard to the mode of keeping records, by J. E. Hil- 



gard. 367 



Astronomy, by S. Newcomb 367 



Magnetism, by J. E. Hilgard 369 



Force of gi-avity, by J. E. Hilgard 370 



Ocean physics, (depths, tides, currents, &c.,) by J. E. Hilgard 370 



Meteorology, (temperature, j)ressure of air, moisture, winds, precipitation, 

 clonds, aurora, electricity, optics, meteors, ozone, miscellaneous,) by Joseph 



Henry 379 



Natural history, by S.F.Baird 379 



Geology, by F. B. Meek 381 



Glaciers, by L. Agassiz 385 



Ethnology : 



ludi.an mounds near Fort Wadsworth, Dakota, by Dr. A. J. Comfort 389 



Antiquities on the Cache la Poudre River, Weld County, Colorado Terri- 

 tory, by E. S. Berthoud 402 



Antiquities in New Mexico, by W. B. Lyon 403 



Antiquities in Lenoir County, North Carolina, by J. Mason Spainhour 404 



Account of the old. Indian village, Kushlvuslikec, near Newcastle, Pennsyl- 

 vania, by E. M. McConuell 406 



Pima Indians, of Arizona, by Caiitain F. E. Grossmaun 407 



Indian mode of making arrow-heads and obtaining fire, by General George 



Crook 420 



Ancient mound near Lexington, Kentucky, by Dr. Robert Peter 420 



Shell-heap in Georgia, by D. Brown, of New Jersey 423 



Remarks on an ancient relic of Maya sculpture, by Dr. Arthur Schott 423 



Ancient history of North America, communication to the Anthropological 



Society of Vienna, by Dr. M. Mucli 425 



On the language of the Dakota or Sioux Indians, by F. L. O. Rochrig 434 



Meteorology, with notes by Professor Henry 451 



Meteorology of Porto Rico, by George Latimer 451 



Meteorology of the Green River country, by Colonel Collins 453 



Distinction between tornadoes and tempests, by Lamark 455 



Account of a tornado which occurred iu Spruce Creek Valley, Centre County, 



Pennsylvania, by Rev. J. B. Meek 456 



Eftect of the moon on the weather 460 



