THE POPULATION OF COLORADO 207 
The states showing the greatest decline in representation in the 
territory during this period are the following: Ohio (2,068); Illinois 
(1,808); Indiana (1,779); Missouri (1,608); New York (1,164). The 
states which compose the first group lost heavily in numbers at the census 
of 1870, and the percentages of loss are much the same in the various 
groups. The states whose native immigrants to Colorado amounted to 
considerable numbers which had not declined at the census of 1870 are: 
Pennsylvania, represented by 1,405 in 1860, 1,552 in 1870, and Iowa, 
797 in 1860, 1,310 in 1870. 
The decade from 1870 to 1880 again shows a large increase in the 
population, native immigrants coming in great numbers from all the 
states. The Leadville strikes had been made in 1877, agriculture was 
developing, 1,400 miles of railroad had been built, the state had been 
admitted to the Union in 1876 and was generally prosperous. The most 
noticeable change in the groups of states furnishing the largest numbers 
of native immigrants is the rapid increase in migration from Iowa, 1,310 
in 1870 to 7,520 in 1880, and Kansas, 269 in 1870 to 4,011 in 1880. 
The decade following 1880 was a period of unrivaled prosperity for 
the state. Native immigrants from the various states increased rapidly, 
Iowa and Kansas taking rank with Ohio, Illinois, New York, Missouri, 
Indiana and Pennsylvania as the states furnishing the greatest numbers. 
A characteristic of the growth during this decade was a more even develop- 
ment. More machinery was{used in mining and fewer persons were 
engaged in this industry in 1890 than in 1880. Judged by the number 
of workers, manufactures had increased 200 per cent. and agriculture 
in almost the same proportion. Eleven new agricultural counties had 
been organized in the eastern part of the state. 
The decade from 1890 to 1900 was characterized by the panic of 
1893, the fall in the price of silver and the depression which lasted until 
1896 or 1897. It is accordingly a period when migration from other 
states was considerably checked. The number of persons in Colorado 
born in New York, Pennsylvania, Massachusetts, Connecticut, Maine 
and Vermont was less in 1g00 than in 1890.7, This phenomenon is hard 
t Paxson, “County Boundaries of Colorado,” University of Colorado Studies, Vol. III, No. 4, August, 
1906. 
2 An emigration from the eastern counties also occurred at this time. 
