Excerpt from The Migration of Birds: A Consideration of Herr Gatke's Views In a volume replete with interest, special prominence will be found attaching to the author's opinions expressed in the leading chapters relating to the direction, attitude, velocity, order, guid ing power, and meteorological conditions affecting the migratory flight. The remainder of the work being chiefly occupied by notes on the various species visiting the island, under their separate headings. No one has perhaps more closely studied, or had better opportunities for the observation of the different phases ofmigration, than the veteran author; and the results of his fifty years or more of labour, as now presented to the notice of the ornithological world, are eloquent testimony to the untiring zeal and energy of an accomplished field naturalist. The Opinions he expresses, on the special department of ornithological science, for the study of which Heligoland is so pre-eminently adapted, will naturally have the greatest weight with all, and some in their admiration for the veteran observer have formed the opinion, that all, or nearly all of our previous conceptions, as to the direction, attitude and velocity of the migratory flight, will have to be greatly modified or altogether abandoned in favour of those he sets before us. 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.