204 UNIVERSITY OF COLORADO STUDIES 
The second group of states is composed of Kentucky, Pennsylvania, 
Massachusetts and Wisconsin, and the number of men who came from 
these varies between 1,861 from Kentucky and 1,204 from Wisconsin. 
The third group contains the other states and at the head of the list 
is Connecticut with 980 of its native born in Colorado in 1860. 
Some explanation of the difference in the number of native immi- 
grants furnished by the various states may be found by a consideration 
of the ages of these immigrants and an examination of the conditions of 
their native states three decades earlier as well as the character of the 
ancestors from which they sprang. The following table shows the 
population of the territory of Colorado distributed according to age: 
POPULATION OF COLORADO, 1860, DisTRIBUTED BY AGE GROUPS* 
INSEE ide oes tL: of 
Wriderpr yearn en cel teeter 49 0.15 
MPEG AGEL) (Spel ie wiee ise 406 E23 
Shes Balmeh Kel aratea teens 315 0.9 
nite Hs EY ey Wie y58 Oh, ae 298 0.9 
A FEE RCION ES Sacre gI5 a7 
200s REMAIN) ee otaitt tate 18,143 53-8 
2005 SUV Keine sa cia 10,806 32.0 
4o “ LO UN FJohs 4 apicha orate 2,210 6.5 
600.5; See Onl seuarettieNs 409 Tas 
WON RE SOry. chareterstera i 
80 “ EO OO meester sete 3 
oie eats 5 srieeniot I 
(UmkkriG wate. taps eysteeer sists 533 
MRotallise sk trac eloversete tate 34,277 
* Census, 1860, Population, p. 547. 
From this table it appears that 28,949, or 85.8 per cent. of the 33,744 
persons of known age in the territory in 1860, were under 4o years of age, 
and 18,143 of these, or 53.8 per cent. of the total, were between 20 and 
30; and gts, or 2.7 per cent. of all, were between 15 and 20. ‘The move- 
ment of population, therefore, was primarily a movement of young men, 
men born in the period of which 1830 may be said to be the central year. 
It will be seen that the group of states each of which furnished more 
than 2,500 native immigrants is composed of states which were being 
rapidly settled in the period from 1820 to 1840. Western New York 
was comparatively new till after the opening of the Erie Canal in 1825. 
