. Artificial incubation and incubators ... the chick may be seen to movein the shell—not suddenly, but more of a waving, or slow pulsa-ting move- ^^^ggj^-^-^^^ ment. Theappearance ^^gjjfljjpi^ ^-fc\ °^ the dead embryo at j^^^^^^^^^^^^^^^^^^^^k ^s s^a&e *ss h o w n a t ^if|sgiggjgSSiBjSI||||^\ Fig. 17. with-out distinct- /^^^B^^^^^^^^^^^^^^^^^^1 nessorform. time those ^fe=lll5E=il^^^ifiiti=|r that wereleft in at the ^^^p^j^ZZZI^zligllP^ previous tri- al as doubt- ^- ful will be found to Fig. 16. have under- gone no change, and should be taken out. It is best to mark sucheggs as we are in doubt
. Artificial incubation and incubators ... the chick may be seen to movein the shell—not suddenly, but more of a waving, or slow pulsa-ting move- ^^^ggj^-^-^^^ ment. Theappearance ^^gjjfljjpi^ ^-fc\ °^ the dead embryo at j^^^^^^^^^^^^^^^^^^^^k ^s s^a&e *ss h o w n a t ^if|sgiggjgSSiBjSI||||^\ Fig. 17. with-out distinct- /^^^B^^^^^^^^^^^^^^^^^^1 nessorform. time those ^fe=lll5E=il^^^ifiiti=|r that wereleft in at the ^^^p^j^ZZZI^zligllP^ previous tri- al as doubt- ^- ful will be found to Fig. 16. have under- gone no change, and should be taken out. It is best to mark sucheggs as we are in doubt about, with an interrogation point (?).They are then readily distinguished from those known to be fertileand alive. By this time most of the embryo chicks will be feather-ed, and will almost fill the shell, leaving a small, light space onone side of the small end «of the shell, as also the air cell at thelarge end. By theday the en-opaque, ex-cell at thethe egg ap-shown athowever, weappearingwith the airside, and allin nine cases. eighteenthtire shell iscept the airbutt end, andpears asFig. anlike onelse opaque,out of ten the If, egg19,the Fig. will be found to be dead. We also often find an egg at about the eighteenth day with theair bubble occupying nearly one-third of the egg—the line betweenthe chick and the air cell being irregular but distinct. In suchcases the chick is either dead, or, from some cause, not as fullymatured as it should be. If hatched at all, it is usually deformed;but generally it dies in the shell. TURNING THE EGGS. 33 In these illustrations, prepared expressly for this work, I havegiven the general appearance of the egg as seen through theegg tester. Variations are frequent, the air bubble sometimesappearing to one side of the butt end; but I have never yet founda fertile egg with the air bubble, at the first testing, in the posi-tion shown in Fig. 19. In turning the eggs it is well to change their positions in the positi
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectincubat, bookyear1883
