The American Bird Fancier; Or How to Breed, Rear, and Care for Song and Domestic Birds
| Preis: | 12.95 EUR* (inkl. MWST zzgl. Versand - Preis kann jetzt höher sein!) |
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| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Browne, D. J.) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from The American Bird Fancier; Or How to Breed, Rear, and Care for Song and Domestic Birds: With Their Diseases and Remedies The structure of birds and their habits of life, are wonderfully adapted to the various functions they are destined to perform. The pointed beak, the long and pliant neck, the gently-swelling shoulder, the expansive wings, the tapering tail, the light and bony feet, are all wisely calculated to assist and accelerate their motion through the yielding air. Every part of their frame is formed for lightness and buoyancy; their bodies are covered with a soft and delicate plumage, so disposed as to protect them from the intense cold of the atmosphere through which they pass; their wings are made of the lightest materials, and yet, the force with which they strike the air is so great, as to impel their bodies forward with astonishing rapidity, while the tail serves as a rudder to direct them to the different objects of their pursuit. The internal structure of birds is no less wisely adapted to the same purposes. Their lungs have several openings, communicating with corresponding air bags, or cells, which fill the whole cavity of the body from the neck downwards, and into which the air passes and re-passes, in the process of breathing. This is not all; their very bones are hollowed out with the design of receiving air from the lungs, from which air pipes are conveyed to the most solid parts of the body, and even into the quills and plumelets of the feathers which are hollow or spongy for its reception. As all these hollow parts, as well as the cells, are only open on the side communicating with the lungs, the bird requires only to take in a full breath to fill and distend its whole body with air, which, in consequence of the considerable heat of its body, is rendered much lighter than the air of the atmosphere. By forcing this air out of the body again, the weight becomes so much increased, that birds of a large size can dart down from great heights in the air with astonishing rapidity. This almost universal diffusion of air in the bodies of birds is of infinite use to them, not only in these long and laborious flights, but likewise in preventing their respiration from being stopped or interrupted by the rapidity of their motion through a resisting medium. 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.
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