1 MIGRATION AND BUSINESS CYCLES 
in the number unemployed. On the whole, in these three-month 
periods, the volume of net immigration is much smaller than the 
contemporaneous changes in the number unemployed. 
TABLE 27.—NET ALIEN MALE MIGRATION AND CHANGE IN NUMBER EMPLOYED 
IN NON-AGRICULTURAL OCCUPATIONS: DEPRESSION OF 
1911-1912 
NET MIGRATION OF ALIEN MALES [HART'S ESTIMATE OF NUMBER UNEM- 
. PLOYED IN NON-AGRICULTURAL OC- 
(THOUSANDS) CUPATIONS (MILLIONS)P 
YEAR - — : > = 
AND HANGE IN 
MONTH In Sr ToTAL In 3 monTHS CHANGE 
SPECIFIED | CED 2 AFTER SPECIFIED ENDING IN AFTER 
MONTH | % - G Dre. 1910 | MONTH sPECIFIED DEC. 1910 
Biri MONTH 
Bo C D E F 
1911 
Jan. 4.0 PR 4.0 3.2 xe 41.1 
Feb. | 14.0 med 18.0 3.5 ad 1-104 
Mar. | 41.9 59.9 59.9 3.1 +1.0 —+1.0 
Apr. 51.9 107.7 | 111.8 2.9 —0.3 | 40.8 
May 37.6 131.3 149.3 2.7 —0.8 -+0.6 
June 11.5 101.0 160.9 2.3 —0.3 +0.7 
July ' 414.5 34.6 146.4 3.0 +0.1 +0.9 
Aug. 43.5 4116.5 142.8 2-9 —+0.2 +0.8 
Sept. 3.0 415.0 145.8 2.3 | ~0.5 +0.92 
Oct. 5.8 5.2 151.6 2.1 —0.9 .0 
Nov. d 19.7 4 10.9 131.9 24 —0.5 +0.3 
Dec. a4 19.5 da 33.4 112.5 2.9 +0.6 +0.8 
1912 
Jan. 5.0 a 34.1 117.5 35 +1.4 +1.4 
Feb. 14.4 d il 131.9 3.7 +1.3 +1.6 
Mar. 48.6 68.0 180.4 3.2 +0.3 +1.1 
Apr. 56.7 119.6 237.1 2.9 | 0.6 10.8 
May 60.7 166.0 297.8 27 —1.0 —+0.6 
June 35.5 152.9 333.3 2 —0.4 40.7 
July 29.4 125.6 362.7 oo —0 1 +0.7 
Aug. 30.1 95.0 392.8 : +0.2 
sFrom data in Table 24. Columns B and C computed from A. 
bFrom Hornell Hart, Fluctuations in Unemployment in Cities of the United States, 1902 lo 1917, Studies 
rom the Helen S. Trounstine Foundation, Volume I, Number 2. 
Columns E and F were computed from D. 
d = Excess of departures over arrivals. 
In the right-hand section of Chart 22 there 1s shown, by months, 
the cumulated number of net arrivals of male aliens beginning with 
January, 1911, and the change in the number unemployed in non- 
agricultural pursuits in the given month as compared with De- 
-18