COLOURED YOLKS

Lake Wakatip Mail, Issue 4431, 29 August 1939, Page 3

COLOURED YOLKS

HENS FED ON VARIOUS MINERALS Bed, white, or green yolked eggs arc not the usual store variety, but researchers of Kansas State College exhibited recently several normally laid eggs whose yolks were of these extraordinary hues to illustrate for the American Chemical Society that “as a hen is fed, so shall she lay.” The technique is not one of dyeing either heu or egg, but rather supplying or not supplying various colourresponsible minerals. Olive-coloured volks, for example, have been produced bv feeding hens a molasses-oat-grass silage. Hens lay eggs with colourless yolks when feci on a colour-free ration. When hard-boiled such eggs are as white as snow. Red eggs came from feeding lobster shell, and green eggs came from feeding foods high in green colouring matter. At present studies arc concerned with solving the question of why a yolk is oils not yellow. Later investigations may disclose culinary or artistic possibilities of varicoloured yolks.