. Artificial incubation and incubators ... egg, as view-the egg-test-eggs do notappearance,largement ofble, if left induring theweeks of in-After thethe white, orcomes wa-yolk loses its Fig. ; but a non-fertile egg will not become rotten by thesimple action of the ordinary incubating heat. If removed at twoor three days, it is not injured for culinary purposes; but if leftunder heat a week or ten days the white and yolk will usuallyrun together if the egg be boiled. My practice is to save the bar-ren eggs taking them out at the first testing, and boil them for the youngthey are f
. Artificial incubation and incubators ... egg, as view-the egg-test-eggs do notappearance,largement ofble, if left induring theweeks of in-After thethe white, orcomes wa-yolk loses its Fig. ; but a non-fertile egg will not become rotten by thesimple action of the ordinary incubating heat. If removed at twoor three days, it is not injured for culinary purposes; but if leftunder heat a week or ten days the white and yolk will usuallyrun together if the egg be boiled. My practice is to save the bar-ren eggs taking them out at the first testing, and boil them for the youngthey are firstFigure 14embryo atdays, as seentester ; anddead one,has germin-f rom ineffec-tion, or otherdied. Inthe dead. chicks whenhatched,shows alivefour to fivethrough theFigure 15 ai. e., one thatated, buttive f ertiliza-causes, hasthese casesgerm, or Fig. spot, will often be found adhering to the side of the shell,while in a five embryo the germinal disc will gradually rise to thetop as the shell is turned. In the live embryo the vejns will bedistinct, and, if the egg is white-shelled, the color of the bloodcan be seen; in a dead one, the veins are simply dark, irregularlines, broken and clouded, the cloudiness shading into the vitellinemembrane. 32 LIVING AND DEAD EMBRYOS. Those eggs which have germinated but died, should also beremoved. These are the ones that become rotten, and are sooffensive. This testing should be repeated about the tenth day, when theliving embryo will be seen through the shell, as represented atFig. 16. Holding the egg steadily the chick may be seen to movein the shell—not suddenly, but more of a waving, or slow pulsa-ting move- ^^^ggj^-^-^^^ ment. Theappearance ^
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectincubat, bookyear1883
