. Account of an expedition from Pittsburgh to the Rocky Mountains, performed in the years 1819 and '20 : by order of the Hon. Calhoun, sec'y of war: under the command of Major Stephen H. Long. From the notes of Major Long, Mr. T. Say, and other gentlemen of the exploring party. Indians of North America; Discoveries in geography; Indians of North America. June 16, 1819. *d mean of eight Lunar distances, and the time corresponding, was found as follows. Time per Chrono- Distance of nearest meter, A M. limbs. June 16, 1819. 6" 34' 261' 69° 51' 30i" Index Error. + ^5^ Data resulting
. Account of an expedition from Pittsburgh to the Rocky Mountains, performed in the years 1819 and '20 : by order of the Hon. Calhoun, sec'y of war: under the command of Major Stephen H. Long. From the notes of Major Long, Mr. T. Say, and other gentlemen of the exploring party. Indians of North America; Discoveries in geography; Indians of North America. June 16, 1819. *d mean of eight Lunar distances, and the time corresponding, was found as follows. Time per Chrono- Distance of nearest meter, A M. limbs. June 16, 1819. 6" 34' 261' 69° 51' 30i" Index Error. + ^5^ Data resulting from the foregoing Lunar Observations. St. Louis, June 16, 1819. In latitude 38° 36' 18" N. and longi- tude about 6" W. of the meridian of Greenwich, at 6^ 34' 26^" A. TVI. civil account per chronometer, the distance of the nearest limbs of the sun and moon was observed to be 69** 51' 46" to find the lon- gitude. Longitude deduced, 6" 00' 25", or 90° 06' 15" W. of Greenwich. »N*ote. The chronometer run down on the night of the 16th, so that the subsequent error in time, compared with the preceding, aflfords no data to estimate the rate of the time-piece. Equal altitudes of Sun to find the error of Time-piece at noon. June 17,1819. Time from Noon A. M. 4h 42' 23" 4 41 03 4 39 42i Time from Noon, P. M. Error of Time- 5' 201" fast. Mean time. Observations at St. Louis, to ascertain the magnetic variation. June 17, 1819. Double altitude of Sun's upper limb. Magnetic varia- Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original James, Edwin, 1797-1861, comp; Long, Stephen Harriman, 1784-1864; Say, Thomas, 1787-1834; Adams, John, 1735-1826, former owner. BRL; John Adams Library (Boston Public Library) BRL. Philadelphia : H. C. Carey and I. Lea . ..
Size: 1845px × 1354px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorad, bookcentury1800, booksubjectdiscoveriesingeography
