. Wright's book of poultry, revised and edited in accordance with the latest poultry club standards. epeat the accident. If this treatmentbe neglected, hatching will probably fail alto-gether. Sometimes valuable eggs may getcracked within a few days of incubation ; inmany such cases the egg or chick has beensaved by pasting over the crack a small stripof gummed paper, or, in the case of Bantameggs, of goldbeaters skin. Cases of perforatedmetal large enough to contain an t^% are some-times used in such instances, and may be have seen another form, in some respectsbetter, the metal bei
. Wright's book of poultry, revised and edited in accordance with the latest poultry club standards. epeat the accident. If this treatmentbe neglected, hatching will probably fail alto-gether. Sometimes valuable eggs may getcracked within a few days of incubation ; inmany such cases the egg or chick has beensaved by pasting over the crack a small stripof gummed paper, or, in the case of Bantameggs, of goldbeaters skin. Cases of perforatedmetal large enough to contain an t^% are some-times used in such instances, and may be have seen another form, in some respectsbetter, the metal being thinner and enamelledwhite, and furnished with small perforationsall over. These egg-cases, or protectors, may alsobe used to contain insecticides or the expiration of from six to eight daysthe eggs should be examined by candlelight, as the unfertile ones can then beTesting Eggs, easily detected, and if the greater part be sterile time is saved, asthe same hen may be at once set again. Anew-laid egg, as is well known, appears clearand translucent when held between the e\e and. Fig;. 31 and 32.—Testing Egg^.Barren Egg. Fertile Egg. a candle. Barren eggs appear so still (as shownin Fig. 31), even after being sat upon a week;but the eggs which contain embr\o chickensthen have a dark shadow in the centre, shadingoff to more transparenc}- at the edges. Theamount of shadow will vary with the time ofincubation and size of the eggs, and perfectopacity will not be found till nine or ten dayshave elapsed, even with good-sized eggs ; butafter a few experiments, enclosing the egg ri6 THE BOOK OF POULTRY. oeluecn the thumb and forefinger, and turningthe rest of the hand so as to shade the light asmuch as possible, no mistake will ever be made,and even with the hand alone, the quality willbe determined with certainty. By using a plateof tin or zinc to shade the light, and holdingthe egg to an aperture in it, cut to the shape,the light may be brought closer. The egg-test
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectpoultry
