The art of incubation and brooding; . n are very offensive. A deadegg or an unfertile egg, does not contain theanimal heat that live ones do, and are apt to have46 ^^^*^^^**^*^^^^^^5p^^^*^^^^^»^^^^^^^^**5fc^4»ffii^®/ ?&&<&4&&&&44a&&lfr&&&^&&&&&&&&&&&&^&&&&&&&&&&&-^ s fr » an undesirable effect upon the egg next to it, eitherunder the hen or in the incubator. An unfertile egg—one which has not been im-pregnated, and in which life will never start ordevelop—is clear when shown at the tester. Thisegg under the powerful lens of a first-class tester,will show the yelk, which must not be mistaken
The art of incubation and brooding; . n are very offensive. A deadegg or an unfertile egg, does not contain theanimal heat that live ones do, and are apt to have46 ^^^*^^^**^*^^^^^^5p^^^*^^^^^»^^^^^^^^**5fc^4»ffii^®/ ?&&<&4&&&&44a&&lfr&&&^&&&&&&&&&&&&^&&&&&&&&&&&-^ s fr » an undesirable effect upon the egg next to it, eitherunder the hen or in the incubator. An unfertile egg—one which has not been im-pregnated, and in which life will never start ordevelop—is clear when shown at the tester. Thisegg under the powerful lens of a first-class tester,will show the yelk, which must not be mistakenfor a doubtful or fertile egg. Use only the very best egg- tester. HOW THE CHICKS DEYELOP. Fig. 7 shows the heart and minute arteries andveins in a circle on the yelk which is enclosed in athin sac. They are plainly seen by the naked eyewhen a strong fertile egg is carefully broken into a. J^^^*5^l^^^^^(^^^^^^l*l^^c|S^^tfa(!^^^^^^Sl^(^^^^^^e^ej5«|5sj5ft/ ?gj saucer or plate, after thirty-six hours incubation. Itshould be done in a warm room, and in a stronglight, when the pulsations of the heart will continuefrom five to ten minutes, and may be can be seen in the veins, but very veins gradually surround the yelk. The chickderives nourishment from the yelk during incuba-
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectincubat, bookyear1894
