8 CONTENTS. 
CHAPTER IX. 
Discussion of barometric observations and tables of altitudes and distances of the line explored from West- 
port, Mo., to Great Salt Lake City, Utah Territory ; also, tables of simultaneous observations in, and 
data for profiles of, the mountain passes of the line—1853. 
I.—Introduction to, and corrections applied in, dnb csi: eomputations.—Table for horary corrections of obser- 
vations.— Corrections for extreme air tempera — Comparison of field barometers with Dr. Engelmann's 
barometer at St. Louis, ee both before in uiii to the surveys.—Table of monthly mean obser- 
vations at St. Louis, by Dr. Engelmann.................... ..- e eer .u. 
Lo mem and ARON observations, and table of altitudes and distances, for the profile of the line of 
rvey from Westport to Great Salt Lake City.............-.....--.- 85m0 02m ---- 
II. palis for protio óf Bodbldedu's Pame 1.22. zz a EA REM RE uk ETT Fere 
IV.—Simultaneous meteorological observations at Coocheto opa Pas 
V.—Observations for a tunnel or deep cut in the Coochetopa Pis, allowing fifty yards as ; the width of the ridge at top 
IV.-—Table IV resumed... oes dcin ces sd Ro cb pub c clie 
VI.—Data for the profile of the Coochetopa Pass, and declivities near its summit 
VII.—Simultaneous meteorological observations at the pass and on the route followed across the Wahsatch range . .. 
VIII.—Data for the profile of the route followed across the Wahsatch mountains 
CHAPTER X. 
Geographical positions and distances travelled on the line of exploration from Westport, Mo., to Great 
. Salt Lake City—1853. 
I.—Letter from Mr. S. Homans, in charge of astronomical department 
II.—Table of geographical positions from Westport, Missouri, to Great Salt Lake City, Utah .................... 
III.—Table of distances travelled, sed those from point to point at which barometrical observations were made, 
on the route from Westport, Missouri, to Great Salt Lake City 
IV.—Table of distances travelled on the ti followed from Westport, Missouri, via Fort ee Kaa spe ae 
creek 
-< APPENDIX A. 
Letters relating to the progress of the survey of the route near the 38th and 39th parallels, in charge of 
Captain Gunnison, 
I.—Letter dated June 20, 1853, Camp, Shawnee Reservation, from Captain Gunnison to the Seeretary of War, 
indicating the line which will be followed in crossing the Plair 
II.—Letter aig August 22, 1853, Camp, Utah creek, near c E i from Captain Gunnison to the 
Secretary of War, P aie the progress of the survey 
III.—Letter dated August 22, 1853, Camp, Utah pek: near Fort Massachusetts, from Captain Gunnison to Colonel 
J.J. Abert, reporting the progress of the surve 
IV.—Letter dated September 20, 1853, Camp 70, Grand river, Utah Territory, from Captain Gunnison to Colonel 
. Abert, reporting the pfogress of the survey 
v. ae dated September 23, 1853, Camp 72, Bitter creek, Utah Territory, from Captain Gunnison to Colonel 
J. J. Abert, forwarding a rude copy of the field-work of the survey 
VI.—Letter dated October 29, 1853, Camp, near Fillmore, Utah Territory, from Lieutenant pota E ipe d. 
J. Abert, reporting the progress of the survey, requesting instructions, and indicating future op 
APPENDIX B. 
poe in | 1853, WE of Lieutenant Peckwiekcs in 1854 
of the maps, sections, and illustrations of the LII of the explorations of Captain | 
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