284 DOMESTICATED ANIMALS AND PLANTS 
wide-ranging races that may be, and likely are, subjected to 
cultivation at very many independent centers. 
Added to these are many undeveloped possibilities in unculti- 
vated fruits, like the huckleberry and the cranberry, which latter 
is coming into semidomestication in order to furnish the demand 
that goes with the Thanksgiving turkey. 
The tropics afford an almost endless variety of fruits, some of 
them only just rescued from the wild. The forests and jungles 
of such formative regions as the Amazon valley abound in fruits 
as well as nuts in the greatest profusion and of the greatest 
variety. The world is being ransacked now for new and valuable 
varieties, either cultivated or wild, and very much of the work 
of domestication of plants is still going on even in our own day, 
though it is a question whether a new animal will ever be added 
by domestication. It looks rather as if in respect to animals we 
should be restricted in our possessions to what we can achieve 
out of the materials already in hand. 
