THE LAW OF PROGRESS 
many points of perfection at one and the 
same time, is because we but little 
understand the mysterious laws of cor- 
relation. 
There is another point that I wish to 
mention here in passing: That domestic 
fowls kept in close confinement are not so 
fertile as those that have a wide range. 
While those that are kept closely confined 
will, perhaps, lay as many eggs, if prop- 
erly cared for, as those that have a wide 
range, yet a larger percentage of the eggs 
laid by the fowls that are closely confined 
will be infertile than will be those of 
the ones that have a wide range. What 
effect confinement has on the organs of 
reproduction of animals to cause them 
to be less fertile when closely confined 
than when running at large, we do not 
know. 
We do know, however, that it is true, 
and that this is the reason why so many 
breeders who don’t have plenty of room 
for their breeding stock are often disap- 
pointed that they don’t get a larger per- 
centage of fertile eggs from them. 
Many of our wild animals when 
brought into captivity cease to reproduce 
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