34 
SURVEY OF TIIE COLORADO OF THE WEST. 
Preliminary maps of the country surveyed have been constructed as 
working-plans for the final maps, and for geological discussions. 
The text of the report on structural geology is partly prepared, but 
much of it yet remains in the form of field-notes. 
The first draught of the ethnological report of the work has been 
made; this needs re-arrangement and careful revision and correction 
before it can be submitted to the printer. 
FORMER APPROPRIATIONS. 
The appropriations which have been made for the work above de- 
scribed are as follows : 
For the fiscal year ending June 30, 1871 $12, 000 
For the fiscal year ending June 30, 1872 12, 000 
For the fiscal year ending June 30, 1873 20, 000 
For the fiscal year ending June 30, 1874 10, 000 
Total amount of appropriations 54, 000 
Under authority of a joint resolution of Congress, approved June 11, 
18G8, the Commissary-General of Subsistence has issued rations to the 
Parties under my charge during all the time field operations have been 
in progress. With this expenditure forty-five thousand square miles of 
territory have been explored and surveyed, including more than a thou- 
sand miles of a river running in a deep gorge varying from a few hun- 
dred to more than six thousand feet in depth, descending in that dis- 
tance more than 5,000 feet, and beset with rocks and interrupted by 
rapids and cataracts, making the navigation both difficult and danger- 
ous. The territory as a whole presents more obstacles to the explorer 
than any other portion of the territory of the United States, as it is 
traversed by deep gorges and set with long lines of cliffs, in many places 
forming impassable barriers to travel. Much of the country is also arid 
and destitute of vegetation. 
WHAT IS NECESSARY 
FOR THE COMPLETION OF THE 
WORK. 
For the proper representation of the minute topographic features 
which have been noted, it will be necessary to construct maps on a 
scale of four miles to the inch — 1-253,440. This will require seven atlas 
sheets. For general discussion it will be necessary to have a map em- 
bracing the entire area surveyed on a scale of twenty miles to the inch 
— 1-1, 207,200. For the purpose of representing the distribution of agri- 
cultural lands, waters available for irrigation, pasture-lands, and timber 
tracts, a second map on the same scale as the last will be necessary. 
This can be reproduced from the same working-plan, and, being an out 
line map, will be inexpensive. 
For geological purposes, seven maps on the same scale as those first 
