It seems most important that experiments in the further domestication of birds should be first addressed to certain, large ground forms which are now in more or less danger of extinction. The newly instituted industry of ostrich farming has probably insured this the noblest remnant of the old avian life from destruction; but the emu and the cassowary are still among the diminishing and endangered forms which unless taken into the human fold are likely soon to pass away. The brush turkey and the bower bird of Australia, two of the most curious inhabitants of that realm of strange life, appear to have qualities of mind and body which would make them readily domesticable and which would cause them to be among the most interesting of our feathered captives. Among the aquatic birds there are many species which are as promising subjects for domestication as any which have been made captive; these if subjugated would prove great additions to our resources of ornament and use. Thus the eider duck, so well known for its wonderful soft down which is plucked from the breast to make a covering for the eggs, though a marine species, would prove domesticable at least on the seashore of high latitudes. There are many other varieties of the family, such as the canvas-back which is so highly esteemed for its flesh, that would likewise afford very interesting subjects for experiment. The wading birds are characteristically very wild and range over a wide field; yet the flamingoes, the herons, and their kindred could probably be brought into at least as near an approach to reconciliation with man as their relations the storks. The comfortable relations which have been established between the last-named species and humankind in northern Europe is probably in nowise due to the peculiarly tamable nature of the bird, but rather to the fact that certain superstitious fancies on the part of the featherless biped led him to protect the feathered visitor of his roofs and chimneys. Should it be desirable to break up the habit of migration in these or other birds which are now accustomed to range up and down the meridians, there seems no reason to doubt that the change could be accomplished with the same ease that it has been in the case of the tamed geese and swans. Experience has shown that with these forms, which probably have not been associated with men for more than three or four thousand years, the migratory instinct, which appears one of the strongest of motives, has utterly disappeared. Not only do they no longer heed the cries of the wild birds of their kind as they fly away on their annual journeys, but they have, through the changes in form induced by their quiet life, lost the power to rise far above the earth. They are even more effectively tamed than are their captors.