INDEX TO GENERAL REPORT. 
Page. 
Altitudes, determination of___..._._._.............. 112-126 
Barometers, defects of____...._______ 112 
table of corrections for ...._..____ 113,115 
Barometric tables in Appendix D, description of________ 126 
Cache creek .....________________ 57 
• Calapooya mountains, description of________ 34 
railroad passthrough........ 49-50 
Camp S, on Why-chus creek, description of_________ 90 
Canoe creek, valley of_______-_ 60-62 
Canon, Klamath river, description of_...._______ 68 
Klamath river, railroad character of________ 44 
lower, of Pit river, railroad character of_______ 42 
Des Chutes river, description of ............ 45,94,95 
upper, of Pit river, railroad character of_____ 43 
Cascade mountains, in Oregon Territory, description of...._____ 30-33 
itinerary of first exploration among___ 77-79 
itinerary of second exploration among____ 79-81 
route of Lieutenant Abbot through____-. 97-101 
Cascades of Columbia, description of. - 32,89 
longitude of........ 13 
Chit-tike creek, cafion of______ 85 
Columbia river, impracticability of constructing wagon road near-- — 33 
navigation of.......... 33 
reconnaissance of_ - 88-90 
width of at Cascades_______ 89-90 
Dalles of Columbia river, description of___......... 88 
Des Chutes river, cafion of... - 45,94,95 
country near head of...........— -- 73-74 
description of.--------- 28 
entrance of canon...... — --- -- 74-75 
Des Chutes valley, general description of............ 28-29 
itinerary of first exploration in_.............- 83-90 
itinerary of second exploration in____ 91-97 
Divide between Klamath marsh and Des Chutes river._______ 72-73 
Escort, division of_........._ — 81 
loss of__________ 102-105 
loss of quartermaster and commissary_______---- HO 
officers of.._____________ 59,62 
Fall river, mouth of ......... 63 
valley of__________ 128 
Fort Dalles, altitude of_..._______ _____ 14 
