. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). ii^-z tray; D, space between bottom boards for ventilation Z22. THE PRINCIPLES OF ARTIFICIAL INCUBATION Incubators may be divided into two classes: those operated by hot air, and those using hot water. The former system is used the more exten- sively in heating incubators ranging in capacity from 60 to 600 eggs. In- cubators holding 1000 eggs or mor
. Annual report of the New York State College of Agriculture at Cornell University and the Agricultural Experiment Station. New York State College of Agriculture; Cornell University. Agricultural Experiment Station; Agriculture -- New York (State). ii^-z tray; D, space between bottom boards for ventilation Z22. THE PRINCIPLES OF ARTIFICIAL INCUBATION Incubators may be divided into two classes: those operated by hot air, and those using hot water. The former system is used the more exten- sively in heating incubators ranging in capacity from 60 to 600 eggs. In- cubators holding 1000 eggs or more are heated by a hot water system. There is little reason why either means of heating should have greater success in hatching than the other, provided the same method of supplying the heat to the Fig 16.—Diffusion method. A, Hot air eggs is used and other factors are equal. pipe; B, porous diaphragm; C, egg The most successful methods of supplying heat to the egg chamber are by diffusion and radiation. There are machines that combine the two principles successfully, and others that use one or the other method with good results. Diffusion.— By this method the fresh air enters the heater, is warmed, passes into the upper part of the egg chamber, and is diffused through the pores of a diaphragm of burlap or other material. It then passes down over and around the eggs and out of the incubator through the ven- tilators or heater.* (See Fig. 16.) Radiation.— The heat is supplied to the egg chamber by direct radiation from a hot air or hot water tank or pipes. (See Fig. 17.) The contact method of supplying heat to the eggs is little used. Al- though this method approaches natural incubation most nearly, it is the least successftd. (See Fig. 18.). Fig. 17.—Radiation method. A, Metal radiator; B, C, egg tray; D, ventilators. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of t
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