Show t FARM 1 POULTRY TESTING EGGS FOR HATCHING Satisfactory C Candler andler May Be Made Mado With Shoe Box Large Enough to Cover Lamp Prepared Prepare by the United States Department Department Department Depart Depart- ment of If Agriculture An egg whether Impregnated or not has a small grayish spot on the surface surface surface sur sur- face of the yolk known as the germinal spot As scon soon as a fertile egg is placed under a hen or in an Incubator development begins All eggs should be tested at least twice during the period of ot Incubation preferably on the seventh and fourteenth days and the Infertile eggs and dead germs removed White eggs can be tested on the fourth or fifth day while the development In eggs having brown shells often can not be seen by the use of ot an ordinary egg tester until the seventh day Dead germs soon decay and give off oft a bad odor If allowed to remain under the hen ben Infertile eggs make good feed for tor young chickens and are often used In the h home me for tor or culinary purposes Most 1 incubator companies furnish testing chimneys with their machines which will fit ordinary lamps Electric or gas lamps may be used in a box boa with a hole bole slightly smaller than an egg cut In the side of the box and at atthe atthe atthe the same level as the light They may also be tested by sunlight or daylight using a shutter or curtain with a small hole In It for the light to shine through A A good homemade egg tester or candler candler candler can- can can be made with a large shoe box or any box that is large enough to go over a lamp lomp by removing the end and cutting a hole a little larger than the size of a quarter In the bottom bottom bot bot- tom of ot the box so that when It Is set over a kerosene lamp the hole In the bottom will be opposite the blaze A J. J t fr fw 4 f xi r 7 ac I-I I An Egg Tester Made From a Shoe Box and a Common Lamp hole bole the size of a silver sliver dollar should be cut In the top of the box to allow the heat to escape The eggs are tested with the large end up so that the size of ot the air cell may be seen as well as the condition of the embryo The testing should take place In a dark room The infer infertile Infertile tile egg when held before the small hole with the lamp lighted Inside the box will look perfectly clear the same as ns a fresh one while a fertile egg will show a small dark spot known as the embryo with a mass of little blood veins extending In all aU directions If the embryo is living If It dead and the egg has been Incubated for at least 40 hours the blood settles away from the embryo toward the edges of ot the yolk forming In some cases an Irregular circle of blood known as a blood ring Eggs vary In this respect some showIng showIng showing show- show Ing only a streak of blood All Infertile infertile Infertile Infer Infer- tile eggs should be removed at the first test The eggs containing strong living embryos are arc dark ad well filled u up on the fourteenth day and show a clear sharp distinct line of demarcation demarcation demarcation demarca demarca- tion between the air cell and the tho growIng growing grow grow- ing embryo embro while dead germs show only partial development and lack this clear distinct outline |