RECOEB AND RESULTS 



ASTRONOMICAL AND GEODETIC OBSERYATIONS. 



General Remarhs. — The Arctic explorations made under the direction of Dr. 

 Isaac I. Hayes, principally comprise the west coast of Smith Strait and Kennedy 

 Channel, the existence of which had previously become known through the expe- 

 dition under Dr. Kane, in the years 1853, '54, '55. 



The scientific materials obtained by the expedition and referred to me for reduc- 

 tion and discussion by Professor Henry, Secretary of the Smithsonian Institution, 

 are presented under the general heads of astronomical, magnetic, tidal, and 

 meteorological observations. 



The observations, especially the meteorological, are discussed on the same 

 general plan as that adopted in the discussion of those of the expedition under 

 Dr. E. K. Kane,^ and also that under Sir J. L. McClintock,^ as published by the 

 Smithsonian Institution. The results, therefore, admit of the strict comparisons 

 which have been made whenever practicable, and whicb. give an additional interest 

 and value to the series of publications of which this forms a part. 



The present division under the title of Astronomical and Geodetic Observations, 

 contains the determination of geographical positions, the results of surveys, and 

 the pendulum experiments for relative force of gravity. Connected with this part 

 is a large chart embracing the region of the exploration under Dr. Kane and that 

 under Dr. Hayes, constructed from the additional materials collected by the latter, 

 and also a smaller chart of the vicinity of Port Foulke, from original surveys. 



The greater and more valuable portion of the observations was made by Mr, 

 August Sonntag, astronomer and physicist to the expedition, and second in com- 

 mand. By his early death the expedition sustained a great loss, and we have espe- 



* Smithsonian Contributions to Knowledge : Magnetical, Meteorological, Astronomical, and Tidal 

 Observations in the Arctic Seas, by Elisha Kent Kane, M. D., U. S. N., made during the second 

 Grinnell expedition in 1853, 1854, and 1855 ; reduced and discussed by Charles A. Schott. Pour 

 parts, separately published in 1858, 1859, and 1860. 



" Smithsonian Contributions to Knowledge : Meteorological Observations in the Arctic Seas, by 

 Sir Francis L. McClintock, E.. N., made in Baffin's Bay and Prince Regent's Inlet, in 1857, 1858, 

 and 1859 ; reduced and discussed by Charles A. Schott. May, 1862. 



1 April, 1865. 



