118
THE MIGRATION OF BIRDS
a bird with short rounded wings like those of the corncrake, which had struck the lantern of a lighthouse with great violence. Its smashed head was nearly severed from its body.
Herr Otto Herman's "Recensio critica automatica" (31) supplies much information about the literature on bird migration: and the strange divergence of opinion an nearly every point. It is carried up to the beginning of the twentieth century, but much of the valuable work done in America is altogether neglected.
A short bibliography is given at the end of the present volume, including the more important works on the subject and a few of the papers in periodical publications referred to in this manual.
