=History.= The growing of ducks for the New York City market began on Long Island at a very early stage of specialization in poultry culture. Many farmers there produced a few hundred ducks for this market each year, and found it very profitable. As the demand increased they tried to increase production to meet it, but were unable to do this, because there was then in this country no duck adapted to their needs. The Aylesbury Duck, the favorite table duck in England, was too delicate. The only hardy white duck that they had was the White Muscovy. This breed was not very satisfactory, because the females are much smaller than the males, but they had to use white ducks, for the colored ducks will not pick clean at the age at which ducks can be marketed most profitably; so they did the best they could with the White Muscovy Duck, under the restrictions placed upon their operations by the difficulty of getting broody hens. While the industry was mostly on Long Island, there were duck growers here and there on the mainland in the vicinity of New York and also near Boston, but there were no duck farms of any importance in other parts of the country. [Illustration: Fig. 133. View from the windmill tower in Fig. 132] When the White Pekin Ducks were brought from China, and reports of their hardiness, prolificacy, and rapid growth were circulated, the duck growers were at first very skeptical, but they soon learned that the reports which they had supposed were greatly exaggerated were literally true. Then every duck grower had to have Pekin Ducks. The production increased very much after the introduction of the Pekin Duck, but the growth of the industry was still retarded by the impossibility of getting all the hens that were needed to hatch the eggs. Several incubators had been invented, which hatched very well for those who had the skill to operate them, but which, in the hands of unskilled operators, spoiled most of the eggs placed in them. About 1890 appeared the first incubators with automatic regulators that really worked so that the ordinary person could manage the machines successfully. One of the New England duck growers who had invented the best of the machines used before this time was already growing ducklings on quite a large scale. On Long Island, where most of the duck farms were located, the farmers were hard to convince of the superiority of incubators for their work. Indeed, the only way that they could be convinced was by practical demonstrations right on their own farms. The first incubators used there were machines set up on trial by a manufacturer who had invented an incubator which was very easy to operate. This man went to the duck growing district, placed machines on various farms, and went from farm to farm daily to attend to them, until the farmers were fully convinced that the machines would do what was claimed for them. In a very short time the artificial method had displaced hatching with hens on the