An Account of the Rise of Navigation PDF Download
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Author: Ralph Hamilton Curtiss
Publisher:
ISBN:
Category : Navigation
Languages : en
Pages : 718
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Book Description
Author: Ralph Hamilton Curtiss
Publisher:
ISBN:
Category : Navigation
Languages : en
Pages : 718
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Book Description
Author: Ralph Hamilton Curtiss
Publisher: Rarebooksclub.com
ISBN: 9781230097596
Category :
Languages : en
Pages : 258
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Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 edition. Excerpt: ...are modified frond segments or highly developed indusia. Only a single megaspore reaches maturity in each megasporangium. The Salviniaceae contain the genera Azolla and Salvinia with between 15 and 20 existing species of the warmer regions and the leaves of the latter genus not appreciably different from those of the existing species are found throughout the Tertiary-period. The Marsiliaceae consist of three genera--the monotypic Brazilian Regnellidium, Pilularia with about six species and Marsilia with over 50 widely distributed existing species. The last has been found fossil as early as the Upper Cretaceous, but is rare and more or less uncertain in the fossil state. The extinct genus Sagenopteris is based for the most part on groups of two to five large asymmetrical reticulate veined pinnules borne digitately at the apex of-a long and rather stout stipe and found as impressions in the late Triassic' (Keuper and Rhaetic) very common in the late Triassic and basal Jurassic (Liassic) with seven or eight species rather widespread during the Lower Cretaceous and surviving in one or two Upper Cretaceous species. Associated with some of the older forms are oval or spherical bodies thought to represent sporocarps. The remainder of the living and fossil ferns, excepting certain illy understood extinct types, such as the Devonian and Lower Carboniferous Archaeopteridae and the Mesozoic Tempskya, may be grouped together in the Leptosporangiate or Eufilicalean order Polypodiales, although there is some evidence for recognizing the Gleichenialles and Matoniales as independent orders. The Polypodiales embrace the great majority of living ferns and include the most specialized and abundant families. Without taking the space to give their...
Author: Schuylkill And Susquehanna Navigation
Publisher: Palala Press
ISBN: 9781341446771
Category :
Languages : en
Pages : 116
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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: William T. Jackman
Publisher:
ISBN:
Category : Inland navigation
Languages : en
Pages : 490
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Book Description
Author: Smithsonian Institution
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 716
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Book Description
Reports for 1884-1886/87 issued in 2 pts., pt. 2 being the Report of the National Museum.
Author: Smithsonian Institution. Board of Regents
Publisher:
ISBN:
Category : Discoveries in science
Languages : en
Pages : 1664
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Book Description
Author: Schuylkill and Susquehanna Navigation
Publisher: Legare Street Press
ISBN: 9781013926174
Category :
Languages : en
Pages : 116
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Book Description
This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Schuylkill and Susquehanna Navigation
Publisher:
ISBN:
Category : Canals
Languages : en
Pages : 80
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Book Description
Author: Schuylkill and Susquehanna Navigation
Publisher:
ISBN:
Category : Canals
Languages : en
Pages : 80
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Book Description
Author: F. G. Major
Publisher: Springer Science & Business Media
ISBN: 1461486726
Category : Science
Languages : en
Pages : 428
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Book Description
Quo Vadis: Evolution of Modern Navigation presents an intelligent and intelligible account of the essential principles underlying the design of satellite navigational systems—with introductory chapters placing them in context with the early development of navigational methods. The material is organized roughly as follows: the first third of the book deals with navigation in the natural world, the early history of navigation, navigating by the stars, precise mechanical chronometers for the determination of longitude at sea, and the development of precise quartz controlled clocks. Then, the reader is introduced to quantum ideas as a lead in to a discussion of microwave and optical interactions with atoms, atomic clocks, laser gyrocompasses, and time based navigation. The final third of the book deals with satellite-based systems, including orbit theory, early satellite navigation systems, and a detailed treatment of the Global Positioning System (GPS). Intended for non-specialists with some knowledge of physics or engineering at the college level, this book covers in an intuitive manner a broad range of topics relevant to the evolution of surface and space navigation, with minimum mathematical formalism.
