Show soft shelled eggs are caused by too much fat hatching eggs should be tested as aa early as the fifth day lint in the case of beginners particularly the seventh day of incubation Is the oie best for the first test by that time it Is an easy matter to detect the infertile egg A cardboard with a round hole bole about abent an inch in diameter cut in the center makes a rood good egg tester the room should be dark excepting tor for the light used in testing the cardboard should he held between the operator and the light and the eggs placed one at a time before the small liole hole in the cardboard the perm germ will then be easily located the dead germ la Is readily distinguished from the live germ as aa it will show a grayish lifeless appearance the infertile egg will appear as clear ns as an ordinarily fresh egg on the other hand the fertile egg will show a dark spot in the center with numerous blood vessels radiating from it T the he eggs that do not show a live germ should of course toe be removed it Is advisable to test again about the fourteenth day as sometimes the kerm germ dies in the course of development such eggs should also be removed at once as decay Is very rapid and frequently they cause changes in the temperature of tile the incubator |