_Sanitation._--When growing stock and laying hens are kept under modern intensive conditions the observance of the rules of sanitation is essential. Failure to observe them is likely to result in loss of production, serious sickness of the flock and the nullifying of all other constructive factors. Dropping boards beneath the roosts must be cleaned frequently and regularly to prevent accumulation of filth. If the dropping boards are constructed of matched lumber with the boards running in the direction in which they are to be scraped it will facilitate the cleaning process. Before the birds are placed in winter quarters the laying house should be thoroughly cleaned of all litter and debris. The interior may then be thoroughly sprayed with a disinfectant composed of some good coal tar preparation, and this repeated in the spring. The surface will need to be painted with a good disinfectant, of which there are a number of commercial preparations on the market. A close watch should be made for vermin in the house and on the birds, and if lice or similar parasites are discovered, immediate action should be taken to destroy both the adults and the eggs, since these parasites will debilitate the flock and prevent their development and may seriously check their ability to lay. _Management of Artificial Lights._--The electric lights mentioned in the previous chapter should be turned on about four-thirty in the morning and kept on until daylight or used for an hour in the late evening. When lights are used there should be plenty of food and water available to enable the birds to take advantage of the additional feeding period. The scratch grain should be increased by 2 pounds daily for each hundred birds when lights are used. Many poultrymen find it advantageous to have a low wattage light burning all night so that hungry individuals may get a meal and return to the perches at all times. Three to five kilowatt hours per month for each hundred birds represents the average current consumption where lights are used. _Practical Suggestions for Efficient Management._--A number of successful poultrymen were recently asked to state the requisites for success in the poultry industry, with particular reference to what is known as the one-man poultry flock. Such a flock is of adequate size to take practically the full time of one person in its operation. As the result of the development of standardized feeding practices, improved equipment and better methods of management, the maximum number of birds that can be successfully managed by one person has greatly increased in recent years. Likewise, the problems of proper feeding, adequate disease control and successful selling have increased as the size of the unit has grown and as greater intensiveness is practiced.