[14] 604 és 
_ENOAMPMENT OW AN ISLAND IN THE SOUTH FORK'OF ‘THE PLATTE RIVER. 
<‘Délermination of lutitude, July 6, 1842—allitude nf Polaris. 
- i 2 Index error = 4 15 noes a 
2 623 es ae 
> fat ees | ee 
“True altitude. Meantime. === | Latitude. 
Deg. min. see. hh. min.  3ee. Deg. min. — gee. 
39 57 21 9 42 30. 4u 61 iq 
5 ‘Determination of longitude, July 6, 1842—altitude of a Aquilz. 
i : _ OBSERVATIONS. _ ao 
