When we first begin shipping for market, our yards are usually filled to their utmost capacity, and we are often crowded for room. As fast as the yards are emptied, they should be disinfected by turning them and sowing a crop of oats at once. By the time these oats are two or three inches high they can be reoccupied by young birds, so that two crops can be grown upon the same ground each season. My plan is this: I do not heat my brooding-house artificially after the first of June, as the building will always be warm enough at that date for ducklings ten days old, without artificial heat. I locate some of my large duck-brooders a short distance apart out-of-doors, building a square pen in front of them, 8x12 feet, with boards a foot wide. Into these brooders I put the newly-hatched ducklings as they come out. They need artificial heat the first few days. Of course it would be poor policy to run the heater for the benefit of a few when it would be a decided injury to thousands. When the ducklings no longer require heat, which will be in a very few days, I remove them at once, either to the brooding-house or to the vacated yards above mentioned, when by this time the oats will be high enough to furnish them with green food. The business is managed in this way as long as there are eggs to hatch. I use the eggs for incubating long after I cease putting them out; for, if there is but one-third fertile, it is more profitable to hatch them than to market them, as the prices on young ducklings after the middle of October usually rule some three or four cents higher per pound than during August and September. During the spring and summer months, when things are under full headway, there is naturally great care and responsibility. It will not do to make too many mistakes or neglect necessary duties. The young birds must be fed regularly and given the differently prepared foods according to age,--water supplied, grass and corn fodder cut and distributed according to need. Lamps to trim and replenish, eight thousand eggs to turn twice each day; a new hatch of ducklings coming off nearly every day; the machine to be filled with nicely washed eggs; one to two thousand pounds of ducklings dressed and packed for market daily; cleaning and disinfecting yards; entertaining visitors, who flock here by dozens,--furnish all the occupation we need. Indeed, were it not for the immense profits attending the business, we might consider it rather more than we ought to do.