Guide To The Study Of Insects, And A Treatise On Those Injurious And Beneficial To Crops (1870) - Couverture souple

Packard, Alpheus Spring

Couverture souple

ISBN 10 : 1436863899 ISBN 13 : 9781436863896

Editeur : Kessinger Publishing, 2008

Synopsis

Guide To The Study Of Insects, And A Treatise On Those Injurious And Beneficial To Crops is a comprehensive book written by Alpheus Spring Packard in 1870. The book provides a detailed guide to the study of insects, their anatomy, physiology, and behavior. It is a valuable resource for anyone interested in entomology or the study of insects.The book is divided into two parts. The first part covers the anatomy and physiology of insects, their classification, and their life cycle. The second part focuses on the insects that are harmful or beneficial to crops. It provides information on how to identify these insects, their habits, and how to control them.The book is written in a clear and concise manner, making it easy to understand for both beginners and experts in the field. It also includes numerous illustrations and diagrams to aid in the identification of insects.Overall, Guide To The Study Of Insects, And A Treatise On Those Injurious And Beneficial To Crops is an essential resource for anyone interested in the study of insects or agriculture. It provides valuable information on the identification and control of insects, making it a must-read for farmers, gardeners, and anyone interested in the natural world.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.

A propos du livre

Présentation de l'éditeur

Articulated animals are also very distinctly bilateral, i.e. the body is symmetrically divided into two lateral halves, and not only the trunk but the limbs also show this bilateral symmetry. In a less marked degree there is also an anteroposterior symmetry, i.e. each end of the body is opposed, just as each side of the body is, to the other. The line separating the two ends is, however, imaginary and vague. The antennae, on the anterior pole, or head, are represented by the caudal, or anal, stylets (F ig. 2), and the single parts on the median line of the body correspond. Thus the labrum and clypeus are represented by the tergite of the eleventh segment of the abdomen. Flg.2. In all Articulates (F ig. 3) the long, tubular, alimentary canal occupies the centre of the body ;above it lies the heart, or dorsal vessel, and below, upon the under side, rests the nervous system. bT he breathing apparatus, or lungs, in Worms consists of |simple filaments, placed on the front of the head ;or of gill-like processes, as in the Crustaceans, which are formed by membranous expansions of the legs ;or, as in the Insects (F ig. 4), of delicate tubes (tracheae), which Professor Wyman (O nS ymmetry and Homology in Limbs, Proceedings of theB oston Society of Natural History, 1867) has shown that antero-posterior symmetry is very marked in A rticulates. In the adjoining figure of Jcera (F ig. 2) the longitudinal lines illustrate what is meant by bilateral symmetry, and the transverse lines fore and aft symmetry. The two antero-posterior halves of the body are very symmetrical in the Crustacean genera Jcera, Oniscus, Porcellio, and other Crustacea, and also among theM yriapods, Scutigera, Polydesmus, in which the limbs are repeated oppositely, though with different degrees of inequality, from the centre of the body backwards and forwards. Leuckart and Van Beneden have shown that
(Typographical errors above are due to OCR software and don't occur in the book.)

Détails de l'édition

• Éditeur: Kessinger Publishing
• Date d'édition: 2008
• Langue: anglais
• ISBN 10: 1436863899
• ISBN 13: 9781436863896
• Reliure: Broché
• Nombre de pages: 732
• Coordonnées du fabricant: non disponible
• Personne responsable: KreGa Onlinehandel GmbH; 4950000000000; info@krega-onlinehandel.de; ; Birkenweg 31; Brakel; 33034; Allemagne