This vintage book contains a concise guide to mule-breeding canaries and finches, with a specific focus on breeding for appearance and song. This volume contains all the information an existing or prospective breeder might need to know on the subject, and it would make for a useful addition to collections of aviculture literature. The chapters of this book include: "Uncertainties of Mule Breeding", "Good Mules", "Influence of Parents on the Progeny",...