Show Good H Home me Lessons From an Incubator Short Shor Course in Embryology Well Worth Cost of Eggs n t 5 Prepared by the United States State Department of Agriculture Now v during luring the season W len I ors are r In It IV may happen happen hap- hap happen pen pen that ll pie hC eggs pur purchased n d saved or-saved i for Incubation d oJ fill I Ithe the tray for one hatch This This offers I an an fir excellent t opportunity for an nn Interesting Interesting Inter Inter- I esting and highly edu educational lesson in natural history sa says s 's one of ot the workers In the United States Department Depart Depart- ment nent of ot Agriculture If there Is space for or from 20 to 24 more eggs get them theta from any source where fertility Is probable and mark marl them for cation Operate the tile Incubator as usual but instead of ot Incubating all the experimental eggs eggS' for the thc full 21 day period take one out for examInation examination examination examina examIna- tion each day Ilay watch the tIne daily developments developments developments devel devel- within the shell and observe th the successive lve stages of the growth of the chick from the germinal disk o othe ol of the laid fresh and apparently lifeless life ilfe- lifeless less eggs to the marvelously developed mechanism able to peck It its Ithell hell s-hell and to emerge a living bird It Is possIble possible ble to get something of an nn Idea dea of what Is happening by candling a single single sin sin- sir sir- gle e egg g day after day but a still incite Instructive method Is to first candle an un egg and then break It carefully Into into Into In In- to a saucer This course of 21 simple le lessons sons In embryology is well worth the cost of ot two dozen eggs The whole family Is likely mely to find It Interesting and find Instructive I |