Note 1 — Chapter V · THE EGG (Continued)
Florence Constable Bicknell translation
“Incubation means lying upon. The brooding bird does in fact crouch or lie upon her eggs, warming them with the heat of her body for a number of days with indefatigable patience. When a hen wishes to set,1 she makes it known by her repeated cluckings, little cries of maternal anxiety, by her ruffled feathers, her restless movements, and particularly by the perseverance with which she stays on the nest, even when it has no eggs, where she has been in the habit of laying.