552 
uralized citizens) was secured “by 
mathematical calculations based upon 
Tables XIII and XXXIII, pp. 975 and 
1082, Vol. I of the Census Population 
Report for 1910.’ Subtracting the 
figures of column 6 from those of 
column 5 (the average annual number 
of males actually admitted) we secure 
column 7, showing the annual average 
number of males who would have been 
excluded had the 5 per cent limitation 
principle been in force. 
The number of immigrant children 
admitted during the five years ending 
June 30, 1915, may be secured by 
subtracting the sum of the figures 
given in Table I, columns 3 and 4, 
from the corresponding figures given in 
column 2. 
POINTS TO NOTICE 
1. The proposals here advanced would 
have imposed more rigid restriction 
not only upon Japanese but also upon 
Chinese than is imposed by the present 
laws and arrangements. 
2. The restriction upon Italians is 
particularly striking. But note the 
large disparity between Italian male 
and female immigrants. 
3. The plan here proposed if in force 
The Journal of Heredity 
would have imposed no restriction upon 
Hebrew immigration. 
4. The average immigration from 
Europe for the past five years was, of 
course, seriously disturbed by the strik- 
ing decrease for 1915 because of the 
war. Allowance must be made for 
this factor. 
5. The restriction of the immigration 
of men will, of course, sooner or later 
affect that of women and children. 
6. In column 6, the figure 1,000 
should be substituted in each place 
where the 5% rate would allow an 
immigration less than this amount, in 
harmony with the proposal of paragraph 
(d) above. 
7. The total annual average immigra- 
tion of males from those countries 
whose actual immigration was less 
than their permissible maximum 
amounted to about 170,000 while the 
total permissible annual immigration of 
males from those countries that exceeded 
their permissible maximum amounted 
to about 136,000. If the immigration, 
therefore, of the past five years had been 
regulated by the policy set forth in this 
pamphlet, the average immigration of 
males from all countries would have been 
about 306,000 annually, instead of the 
average of 518,000 that actually were 
admitted. 
A Hypothesis of Semi-sterility Confirmed 
In accounts of semi-sterility (', , %), 
I stated in effect that the fertile F, 
plants from semi-sterile Fy; hybrids 
probably consisted of two classes KK 
and LL, such that intercrossing within 
the classes or back-crossing with the 
proper grandparent should give fertile 
plants, while crossing between the 
classes or back-crossing with the other 
grandparent should give perfectly half- 
sterile plants. This hypothesis has now 
been confirmed as regards back-crossing. 
Two completely fertile lines, descended 
from semi-sterile Fe, and one com- 
pletely fertile F. plant were in the 
ordinary course of breeding back-crossed 
‘Belling, J. A study of semi-sterility. 
*Belling, J. 
1914, 
3Belling, J. Inheritance of semi-sterility. 
The mode of inheritance of semi-sterility. 
with the Florida velvet bean (Stzzolo- 
bium deeringianum), one of their as- 
cendants. Two (KK) plants have per- 
fectly fertile progeny and one (LL) 
gave perfectly semi-sterile progeny, thus 
confirming the hypothesis. The Florida 
velvet bean has now been crossed with 
the Lyon, the Yokohama, and the 
China, with the production in each case 
of a completely semi-sterile first gen- 
eration. Last year the cross of the 
Florida velvet with the fleshy-pod bean 
(S. pachylobium) was carried out, and 
yielded also a_ perfectly semi-sterile 
first generation. 
JOHN BELLING. 
JourNAvL oF Herepity, Vol. v (1914). 
Zt. f. Abst. und Vererbungslehre, 
Fla. Exp. Sta. Report for 1914-5, 
