Gould’s Report on Trans-Atlantic Longitude. 231 
American longitudes; so that we have at present from eclipses 
and occultations : 
Walker, corrected value from observations before 1843, 5 8™, 115-14 
Peirce, from eclipse of 1851, Ju 11°57 
> f 
Peirce, from emersions of Pleiades, 1839, Sept. 26, 11°45 
Peirce, “ - - 1856-1861, 13°13 
2. From Moon Culminations :— 
h. m. 8. 
Walker, from Cambridge obs’tions,,1843-45 5 8 10°01 
oomis, “ Hudson 4 1838-44 9°3 
Gilliss, «Capito Bab ..* 1838-42 10°04 
Walker, “ Washington “ 1845 9°60 
Newcomb, “ < ed 1846-60 11% +0°4— 
Neweomb, “ = sy 1862-3 9°8 
Walker considered 9°:96 as the most probable value from 
moon-culminations, and Newcomb assigned 11*-1 as that indi- 
ign : 
cated by the Washington observations from 1846 to 1863, inclu- 
sive. 
3. From chronometers transported between Boston and Liverpool. 
Mean from 373 previous to 1 5 8 12°46 
849, 
Bond’s discussion of 175, expedition of 1849, 11°14 
Walker’s “ “és 6c bed 12°0 
Bond’s “ ‘“ “ «“ 12°20+1°20 
Bond’s “ of 52, 6 trips, expedition of 1855, 13°43--0°19 
This great uncertainty of the trans-Atlantic longitude—from 
80 to 60 times greater th 
Goodfellow to Heart’s Content, Newfoundland, and Messrs. 
Da ideo a Chee es Calais’ Maine; for, the complete solu- 
