Excerpt from Beeton's Book of Poultry and Domestic Animals: Showing How to Rear and Manage Them in Sickness and in Health The air bones in young birds are described as being filled with marrow, which becomes gradually absorbed, to make room for the admission of air. This gradual expansion of the air-cells and absorption of the marrow can nowhere be observed so well as in young tame geese, when killed in different periods of the autumn and winter. The limits to the air-cells may be clearly seen without, from the transparency of the bony walls. From week to week the marrow disappears, and the air-vessels increase in size, till, towards the close of the season, they become transparent. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.