Show Ultraviolet Ray Is Used in Selecting Eggs for Storage Amsterdam Eggs can be made to tell the truth about their age by exposing them to ultraviolet light it has been discovered at the University of Utrecht The trick depends on the phenomenon phenomenon phe phe- known as fluorescence UltravIolet Ultraviolet Ul Ul- radiation Is Itself Invisible to the human eye but It causes various substances to shine with v light of different colors To the human eye an egg Is jUston Just Justan an on egg But under a beam of ultravIolet ultraviolet ultraviolet ultra ultra- violet a really laid fresh egg glows with a n very pronounced red colora cobra tion Less freshly laid eggs shade into blue and the older they are the deeper is the blue Classified by Ray Investigators at the University of Utrecht first made use se of this new tool of the scientists to select eggs for tor storage A quantity of eggs were classified as to age by ultra ultraviolet violet and ond then placed In storage After Alter six months not one of the quite freshly laid eggs had to be discarded In another another another an an- other group identified by the ultraviolet ultraviolet ultraviolet ultra ultra- violet light as os freshly laid 1 per percent percent percent cent had bad to be thrown away when brought out for use at the end of the six months In a third group of not freshly laid eggs 8 per cent were discarded and ond in a fourth group recognized at the beginning as doubtful 15 per cent had to be rejected |