VI INDEX. 



Page. 



Snow upon the Yukiina Puss 40, 47,48 



Examination of route in detail, from the crossing of the Columbia to Puget Sound, by the pass of the Columbia river. 48 



Total length of the route - 49 



Soil...... 49,50,51 



Climate 51,52,53 



Characteristics of the route 53, 54 



General elevations 53 



Sum of ascenti and descents, &c 53, 54 



Lumber - 54 



Fuel 54 



Tunnels 55 



Estimated cost of road, with remarks 55 



CHAPTER II. 



Route near the forty-first and forty-second parallels of north latitude. 



General description of the route from the Missouri river to Fort Bridger, on a tributary of Green river 56 



Examination of route in detail from the Missouri river to Fort Bridger, (comprising topographical description, 



grades, character of work, supplies of building material, fuel, water, snow, estimate of cost, &c) 50,57 



Examination of route in detail from Fort Bridger, through the Wahsatch mountains, to the south end of the Great 



Salt lake 57,58 



General description of the Great Basin near the latitudes of 41 and 42 58,59 



Examination of route in detail from the south end of the Great Salt lake to the foot of the eastern slope of the Sierra 



Nevada 59 



Plateau of the Sierra Nevada 59, 60 



Examination of the Madelin Pass from the eastern foot of the Sierra Nevada to Round Valley, on the Sacramento 



river GO 



Examination of route in detail along the Sacramento river from Hound Valley to 18 miles above Fort Reading 60 



Detailed description of the Sacramento river through the mountain district ,. 01 



Total length of the route 02 



Timber, building materials, &c 02 



Fuel 62 



Snow, climate, and water 62,03, 04 



Soil 64,65 



Estimate of probable cost of road 05 GO 



Characteristic features of the route 60 



Sum of ascents and descents. (See table, page 107.) 

 Supplement to the examination 



Description of the Rocky Mountain plateau on the route 66 67 



Description of tha country east of the plateau, to the Mississippi river 67 08 



Description of the route from the Missouri river to Fort Bridger, by the South Pass 08,09 



Ditto by Bridger s Pass 09 70 



Lengths, sums of ascents and descents, &c 70 



Connexion of the South Pass with the head-waters of Green river, and connexion with the Columbia river 70 



CHAPTER III. 

 Route near the thirty-eighth and thirty-ninth parallels of north latitude. 



General considerations determining the position of the route 71 



Features of the country from the Rocky mountains to the Great Basin 71 



Great Basin 71 



Timber, building materials, &c 71 



Soil &quot;&quot;. 71,72 



Coal 72 



Elevations of the Rocky Mountain passes, grades, tunnels, and construction of the road from the Coo-che-to-pa Pass, 



in the Rocky mountains, to Sevier lake, in the Great Basin 72 



Length of route 72 



Sum of ascents and descents 72 



Examination of route in detail from the western foot of the Wahsatch mountains to San Francisco by the Tay-ee- 

 chay-pah Pass, in latitude 35, and by the Madelin Pass ; lengths, sums of ascents and descents, and position and 



length of the shortest line from St. Louis to San Francisco 73 



