380 ANNUAL OF SCIENTIFIC DISCOVERY. 



Duration of a solar spot. Jour, of F. I., Feb. 



Electrical wave, velocity of. Mitchell. Astron. Jour., Dec. 13. 



Encke's comet, observations on. Bond. Proc. Am. Acad., Feb. 6. 



Fogs, formation of, on banks and shoals. Desor. Nat. Hist., March 21. 



Great comet of 1843, orbit of. Hubbard. Astron. Jour., Dec. 13, Jan. 7. 



Greenwich observatory. Ath., July 7. 



Heliocentric place of Neptune. Coakly. Astron. Jour., Jan. 7. 



Kew observatory. Ath., Sept. 5. 



Meridional zenith distances, instruments for measuring. Brewster, Oct. 



Method of calculating the elements of the orbits of the planets. Villarceau. C. R., 

 July 30. 



Method of calculating the elements of the relative orbits of the double stars. C. R,., 

 March 26. 



Metis, observations on. Ferguson. Astron. Jour., Jan. 7. 

 " " u Riimker. Astron. Jour., Jan. 7. 



< ; " " Gould. Proc. Am. Acad., Feb. 6. 



Moon's culminations, observations on. Bond. Proc. Am. Acad., Feb. 6. 



Motions of the planets, researches on. Leverrier. C. R., July 2. 



Neptune, vindication of the theory of. Leverrier. Sill., May. 



Heliocentric place of Coakly. Astron. Jour., Jan. 7. 

 " observations on the satellite of. Bond. Proc. Am. Acad., Feb. 6. 



Observations on the sun. Faye. C. R., Feb. 19. 



Observatories, principal English. Brewster, Jan. 



Orbit of a binary star. Herschel. Brewster, Oct. 

 " of the great comet of 1843. Hubbard. Astron. Jour., Dec. 13, Jan. 7. 



Petersen's second comet, observations on. Bond. Proc. Am. Acad., Feb. 6. 



Phenomena attending the disappearance of the rings of Saturn. Bond. Astron. Jour. 

 Jan. 7. 



Planets, method of calculating the elements of the orbits of. Villarceau. C. R., July 30. 

 " researches on the motions of. Leverrier. C. R., July 2. 



Principal English observatories. Brewster, Jan. 



Rain which falls at different heights. Person. C. R., Sept. 10. 



Reflecting telescopes of Rosse and Lassell. Brewster, June. 



Researches on the motions of the planets. Leverrier. C. R., July 2. 



Saturn, phenomena attending the disappearance of the rings of. Bond. Astron. Jour., 

 Jan. 7. 



Saturn, observations on the eighth satellite of. Bond. Proc. Am. Acad., Feb. 6. 



Solar spot, duration of. Jour, of F. I., Feb. 



Stars, double, method of calculating the elements of the relative orbits of. C. R., March 26. 

 " " Villarceau. C. R., Feb. 12, May 14, July 30, Oct. 29. 



Star, binary, orbit of. Herschel. Brewster, Oct. 



Sun, observations on. Faye. C. R., Feb. 19. 



Telescopes, reflecting, of llosse and Lassell. Brewster, June. 



Theory of Neptune, vindication of. Leverrier. Sill., May. 



Velocity of the electrical wave. Mitchell. Astron. Jour., Dec. 13. 



Zenith distances, instruments for measuring. Brewster, Oct. 



Zodiac of Hygea. Hubbard. Astrou. Jour., Dec. 13. 



GEOGRAPHY, ANTIQUITIES, ETC. 



Ancient monuments of Kentucky. Squier. Sill., July. 

 Antarctic, Ross's voyage to the. Sill., May and July. 

 Arctic expeditions. Ath., July 14 and Oct. 13. 

 Coast survey, report on. Philos. Soc. Proc., Jan. 19. 

 Expedition 'to the Dead Sea. Sill., Nov. 



" Exploring, of the U. S. Biot. Jour, des Sav., Nov. and Dec., 1848, Feb. 

 and April, 1849. 



Kentucky, ancient monuments of. Squier. Sill., July. 

 Nile, sources of. Beke. Brewster. Aug. 

 Ross's voyage to the Antarctic. Sill., May and July. 

 Sources of the Nile. Beke. Brewster, Aug. 

 Thibet, table-land of. Ath., Oct. 13. 



