ia and Oregon Trail_ (New York, 1849; revised ed., Boston,
1892),--a narrative of personal experience, as are the two following
books: Bayard Taylor, _Colorado; A Summer Trip_ (New York, 1867);
Samuel Bowles, _The Switzerland of America, A Summer Vacation in
Colorado_ (Springfield, Mass., 1869); F. Fossett, _Colorado; A
Historical, Descriptive and Statistical Work on the Rocky Mountain
Gold and Silver Region_ (Denver, 1878; New York, 1879, 2nd ed., 1880).

On _fauna and flora_: United States Biological Survey, _Bulletins_
(especially No. 10), &c.; the _Biennial Report_ of the State Game and
Fish Commissioner; United States Geological Survey, _10th Annual
Report_, pt. v., and 20th A.R., pt. 5, and various publications of the
United States Forestry Division for forest and forest reserves; Porter
and Coulter, _Synopsis of the Flora of Colorado_ (1879); and scattered
papers in scientific periodicals. On _climate_: United States
Department of Agriculture, _Colorado Climate and Crop Service_
(monthly). On _soil and agriculture_: _Annual Report_ of the State
Board of Agriculture (since 1878), of the State Agricultural College,
Agricultural Experiment Station (since 1887), and of the State Board
of Horticulture; _Biennial Report_ of the State Board of Land
Commissioners (since 1879); publications of the United States
Department of Agriculture, various bulletins on agrostology, water
supply and irrigation, &c. (See Department bibliographies); United
States Census, 1900 (States), _Bulletin_ 177, "Agriculture in
Colorado" (Special), _Bulletin_ 16, "Irrigation in the United States"
(1902), &c.; United States Geological Survey, various materials,
consult bibliographies in its Bulletins 100, 177, 215, 301, &c. On
_manufactures_: publications of United States Census, 1900, and the
special census of manufactures, 1905. On _mineral industries_: United
States Geological Survey, _Annual Report_, annual volume on "Mineral
Resources"; also the annual _Mineral Industry_ (Rothwell's New
York-London); Colorado State Bureau of Mines, _Biennial Report_,
Inspector of Coal Mines, _Biennial Report_ (since 1883-1884); and an
enormous quantity of information in the publications of the United
States Geological Survey. For labour troubles see below. On
_railways_, see annual _Statistics of Railways_ of the United States
Interstate Commerce Commission, and Poor's Manual (Annual, New Yo