- Glass chicken egg used for inducing hens to lay eggs. According to Mrs. Gold, to encourage a hen to lay eggs in a specific place, farmers would often begin making their nests and place the artificial nesting eggs in them with the hope that the hen would complete her nest in that location. This also helped the farmer keep track of which hens were laying eggs and where the eggs were located. The glass eggs remained in the nest until the hen laid and incubated the eggs and the offspring hatched. It was important to maintain this process and promptly remove the artificial egg so that it could be reused.