OPPORTUNITIES FOR IMMIGRANTS !
inspection of these charts, to approximate with the eye the relative
change in different years or in the several curves for any one year.
Depression Years.
When examining the fluctuations in migration, we shall have
frequent occasion to refer to the depression years in industry.
These years of depression may be quite satisfactorily identified for
preliminary comparisons by examination of Charts 6 and 7, on
CHART 6
InpicEs oF Economic (‘onNpITIONS, BY CALENDAR YEARS:
1870-1923
Ratio scale
1000 11000
900 , ! 900
so Ae—e= Railway Trackmen (7housand men) 1 3%
600 B «—- = Bituminous Coal Production (Million tons) 600
s00 C —— = Pig Iron Production (One hundred thousand tons) 500
D »-—x= Volume of Manufacture (/1899=/00)
#0: «inex of Construction (1914=100) oo
soo © o—e = Wholesale Prices (79/3 =/00) 300
5 ~—— = Anthracite Coal Production (Million tons)
200" + 200
100} 100
90 Qo
80+ ] 80
70 1 7C
60| 4 60
so} 50
¢0t I 40
30 30
: 20
o— 2. <9s _Tooh09 | TW |B
sNumerical data in Tables 12-A and 12-B.
pages 59 and 62, which show the relative fluctuations in the annual
statistics. With the exception of the clearings index of business,
the data plotted in these charts have not been corrected for the
growth element, hence a mild depression tendency may be evidenced
merely by a slackening in the rate of increase rather than by a
decided downward slope of the curve. The fluctuations in the
production of pig iron, when they are reasonably well supported by
5G