Varghese oomman (32 Ergebnisse)

- Hardcover
Anbieter: BooksRun, Philadelphia, PA, USABooksRun
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Gebraucht - Gut
EUR 30,84
Versand gratisVersand innerhalb von USAAnzahl: 1 verfügbar
Hardcover. Zustand: Very Good. 2008. It's a well-cared-for item that has seen limited use. The item may show minor signs of wear. All the text is legible, with all pages included. It may have slight markings and/or highlighting.

- Hardcover
Anbieter: Zubal-Books, Since 1961, Cleveland, OH, USAZubal-Books, Since 1961
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Gebraucht - Gut
EUR 29,18
EUR 4,01 VersandVersand innerhalb von USAAnzahl: 1 verfügbar
Zustand: Very Good. 568 pp., Hardcover, minor library markings else text clean & binding tight. - If you are reading this, this item is actually (physically) in our stock and ready for shipment once ordered. We are not bookjackers. Buyer is responsible for any additional duties, taxes, or fees required by recipient's country.…

- Hardcover
Anbieter: books4less (Versandantiquariat Petra Gros GmbH & Co. KG), Welling, Deutschlandbooks4less (Versandantiquariat Petra Gros GmbH & Co. KG)
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Gebraucht - Gut
EUR 19,95
EUR 19,95 VersandVersand von Deutschland nach USAAnzahl: 1 verfügbar
gebundene Ausgabe. Zustand: Gut. 546 Seiten Der Erhaltungszustand des hier angebotenen Werks ist trotz seiner Bibliotheksnutzung sehr sauber und kann entsprechende Merkmale aufweisen (Rückenschild, Instituts-Stempel.). In ENGLISCHER Sprache. Sprache: Englisch Gewicht in Gramm: 920.

Light, Water, Hydrogen: The Solar Generation of Hydrogen by Water Photoelectrolysis
GRIMES, CRAIG [Editor]; VARGHESE, OOMMAN [Editor]; RANJAN, SUDHIR [Editor];
- Hardcover
Anbieter: BennettBooksLtd, Los Angeles, CA, USABennettBooksLtd
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 123,29
EUR 6,19 VersandVersand innerhalb von USAAnzahl: 1 verfügbar
hardcover. Zustand: New. In shrink wrap. Looks like an interesting title.

- Hardcover
Anbieter: Grand Eagle Retail, Bensenville, IL, USAGrand Eagle Retail
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 176,21
Versand gratisVersand innerhalb von USAAnzahl: 1 verfügbar
Hardcover. Zustand: new. Hardcover. Conversion of Water and CO2 to Fuels using Solar Energy Comprehensive Resource for Understanding the Emerging Solar Technologies for Hydrogen Generation via Water Splitting and Carbon-based Fuel Production via CO2 Recycling Fossil fuel burning is the primary source of carbon in the atmosphere. The realization that such burning can harm the life on our planet, has led to a surge in research activities that focus on the development of alternative strategies for energy conversion. Fuel generation using solar energy is one of the most promising approaches that has received widespread attention. The fuels produced using sunlight are commonly referred to as solar fuels. This book provides researchers interested in solar fuel generation a comprehensive understanding of the emerging solar technologies for hydrogen generation via water splitting and carbon-based fuel production via CO2 recycling. The book presents the fundamental science, technologies, techno-economic analysis, and most importantly, the materials that are being explored to establish artificial methods of fuel production using solar energy. For the rapid advancement of the field, it is necessary for researchers, particularly for those who are new to the field, to have clear knowledge of various materials studied so far and their performance. For this reason, almost half of the book is dedicated to the discussions on materials and properties. Key topics discussed in the book include: Photocatalytic/photoelectrochemical processes that use semiconductor photocatalysts, including both ceramic and non-ceramic materialsPhotovoltaic assisted electrochemical processesSolar thermochemical processesMolecular photosynthesis Researchers and professionals in the fields of energy and materials and closely related science and engineering disciplines could use this book to acquire clear insights on both mainstream solar fuel technologies and those in the developmental stages. Shipping may be from multiple locations in the US or from the UK, depending on stock availability.…

- Softcover
Anbieter: Ria Christie Collections, Uxbridge, Vereinigtes KönigreichRia Christie Collections
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 172,93
EUR 13,49 VersandVersand von Vereinigtes Königreich nach USAAnzahl: Mehr als 20 verfügbar
Zustand: New. In English.

Sprache: Englisch
Verlag: Secaucus, New Jersey, U.S.A.: Springer Verlag, 2007
- Hardcover
- Erstausgabe
- Signiert
Anbieter: Unique Books, Lexington, KY, USAUnique Books
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Gebraucht - Gut bis sehr gut
EUR 183,13
EUR 4,90 VersandVersand innerhalb von USAAnzahl: 1 verfügbar
Hardcover. Zustand: Near Fine. No Jacket. 1st Edition. Authors gift inscription on ffep. Inscribed by Author(s).

- Softcover
Anbieter: GreatBookPrices, Columbia, MD, USAGreatBookPrices
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 191,21
EUR 2,35 VersandVersand innerhalb von USAAnzahl: 15 verfügbar
Zustand: New.

- Hardcover
Anbieter: GreatBookPrices, Columbia, MD, USAGreatBookPrices
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 191,60
EUR 2,35 VersandVersand innerhalb von USAAnzahl: 15 verfügbar
Zustand: New.

- Hardcover
Anbieter: AussieBookSeller, Truganina, VIC, AustralienAussieBookSeller
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 160,65
EUR 32,97 VersandVersand von Australien nach USAAnzahl: 1 verfügbar
Hardcover. Zustand: new. Hardcover. Conversion of Water and CO2 to Fuels using Solar Energy Comprehensive Resource for Understanding the Emerging Solar Technologies for Hydrogen Generation via Water Splitting and Carbon-based Fuel Production via CO2 Recycling Fossil fuel burning is the primary source of carbon in the atmosphere. The realization that such burning can harm the life on our planet, has led to a surge in research activities that focus on the development of alternative strategies for energy conversion. Fuel generation using solar energy is one of the most promising approaches that has received widespread attention. The fuels produced using sunlight are commonly referred to as solar fuels. This book provides researchers interested in solar fuel generation a comprehensive understanding of the emerging solar technologies for hydrogen generation via water splitting and carbon-based fuel production via CO2 recycling. The book presents the fundamental science, technologies, techno-economic analysis, and most importantly, the materials that are being explored to establish artificial methods of fuel production using solar energy. For the rapid advancement of the field, it is necessary for researchers, particularly for those who are new to the field, to have clear knowledge of various materials studied so far and their performance. For this reason, almost half of the book is dedicated to the discussions on materials and properties. Key topics discussed in the book include: Photocatalytic/photoelectrochemical processes that use semiconductor photocatalysts, including both ceramic and non-ceramic materialsPhotovoltaic assisted electrochemical processesSolar thermochemical processesMolecular photosynthesis Researchers and professionals in the fields of energy and materials and closely related science and engineering disciplines could use this book to acquire clear insights on both mainstream solar fuel technologies and those in the developmental stages. Shipping may be from our Sydney, NSW warehouse or from our UK or US warehouse, depending on stock availability.…

- Softcover
Anbieter: GreatBookPrices, Columbia, MD, USAGreatBookPrices
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Gebraucht - Wie neu
EUR 192,94
EUR 2,35 VersandVersand innerhalb von USAAnzahl: 15 verfügbar
Zustand: As New. Unread book in perfect condition.

- Hardcover
Anbieter: GreatBookPrices, Columbia, MD, USAGreatBookPrices
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Gebraucht - Wie neu
EUR 193,31
EUR 2,35 VersandVersand innerhalb von USAAnzahl: 15 verfügbar
Zustand: As New. Unread book in perfect condition.

- Hardcover
Anbieter: Ria Christie Collections, Uxbridge, Vereinigtes KönigreichRia Christie Collections
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 186,79
EUR 17,85 VersandVersand von Vereinigtes Königreich nach USAAnzahl: Mehr als 20 verfügbar
Zustand: New. In English.

- Hardcover
Anbieter: CitiRetail, Stevenage, Vereinigtes KönigreichCitiRetail
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 170,38
EUR 44,20 VersandVersand von Vereinigtes Königreich nach USAAnzahl: 1 verfügbar
Hardcover. Zustand: new. Hardcover. Conversion of Water and CO2 to Fuels using Solar Energy Comprehensive Resource for Understanding the Emerging Solar Technologies for Hydrogen Generation via Water Splitting and Carbon-based Fuel Production via CO2 Recycling Fossil fuel burning is the primary source of carbon in the atmosphere. The realization that such burning can harm the life on our planet, has led to a surge in research activities that focus on the development of alternative strategies for energy conversion. Fuel generation using solar energy is one of the most promising approaches that has received widespread attention. The fuels produced using sunlight are commonly referred to as solar fuels. This book provides researchers interested in solar fuel generation a comprehensive understanding of the emerging solar technologies for hydrogen generation via water splitting and carbon-based fuel production via CO2 recycling. The book presents the fundamental science, technologies, techno-economic analysis, and most importantly, the materials that are being explored to establish artificial methods of fuel production using solar energy. For the rapid advancement of the field, it is necessary for researchers, particularly for those who are new to the field, to have clear knowledge of various materials studied so far and their performance. For this reason, almost half of the book is dedicated to the discussions on materials and properties. Key topics discussed in the book include: Photocatalytic/photoelectrochemical processes that use semiconductor photocatalysts, including both ceramic and non-ceramic materialsPhotovoltaic assisted electrochemical processesSolar thermochemical processesMolecular photosynthesis Researchers and professionals in the fields of energy and materials and closely related science and engineering disciplines could use this book to acquire clear insights on both mainstream solar fuel technologies and those in the developmental stages. Shipping may be from our UK warehouse or from our Australian or US warehouses, depending on stock availability.…

- Softcover
Anbieter: preigu, Osnabrück, Deutschlandpreigu
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 140,10
EUR 70,00 VersandVersand von Deutschland nach USAAnzahl: 5 verfügbar
Taschenbuch. Zustand: Neu. Light, Water, Hydrogen | The Solar Generation of Hydrogen by Water Photoelectrolysis | Craig Grimes (u. a.) | Taschenbuch | xxii | Englisch | 2011 | Humana | EAN 9781441941145 | Verantwortliche Person für die EU: Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg, juergen[dot]hartmann[at]springer[dot]com | Anbieter: preigu. …

- Hardcover
Anbieter: AHA-BUCH GmbH, Einbeck, DeutschlandAHA-BUCH GmbH
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 183,30
EUR 35,00 VersandVersand von Deutschland nach USAAnzahl: 1 verfügbar
Buch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - In addition to domestic animals the earliest records of mankind indicate that slavery, until the use of coal became widespread, has always been a significant aspect, or part, of nearly every society. Consider for example ancient Attica (Greece), in which 115,000 out of a total population of 315,000 were slaves [1]. For the lucky rulers slaves represented power, Joule/second or Watt. On a steady state basis a healthy adult generates about 100 Watts, or 100 J/s, while a highly conditioned endurance athlete can generate about 300 W for perhaps an hour. Today we obtain our energy from fossil fuels, that magical brew of latent-heat chemistry that allows us to run the world without having to rely on people or domestic animal power. We owe much if not all of modern civilization to fossil fuels, no more than stored solar energy, which provide the 40-plus Terawatts that annually powers the 7,000,000,000 people on this planet, with our fossil fuel burn rate growing to accommodate the annual increase of some additional 100,000,000 or so souls. The foundation of modern society is a pile (lake) of priceless, irreplaceable fossil fuel that, by any measure of the energy you get and what you pay, is all intents free, and being virtually free we have and continue to burn our way through it as fast as we possibly can. It is the tragedy of the (fossil fuel) commons.…

- Softcover
Anbieter: AHA-BUCH GmbH, Einbeck, DeutschlandAHA-BUCH GmbH
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 183,30
EUR 35,00 VersandVersand von Deutschland nach USAAnzahl: 1 verfügbar
Taschenbuch. Zustand: Neu. Druck auf Anfrage Neuware - Printed after ordering - In addition to domestic animals the earliest records of mankind indicate that slavery, until the use of coal became widespread, has always been a significant aspect, or part, of nearly every society. Consider for example ancient Attica (Greece), in which 115,000 out of a total population of 315,000 were slaves [1]. For the lucky rulers slaves represented power, Joule/second or Watt. On a steady state basis a healthy adult generates about 100 Watts, or 100 J/s, while a highly conditioned endurance athlete can generate about 300 W for perhaps an hour. Today we obtain our energy from fossil fuels, that magical brew of latent-heat chemistry that allows us to run the world without having to rely on people or domestic animal power. We owe much if not all of modern civilization to fossil fuels, no more than stored solar energy, which provide the 40-plus Terawatts that annually powers the 7,000,000,000 people on this planet, with our fossil fuel burn rate growing to accommodate the annual increase of some additional 100,000,000 or so souls. The foundation of modern society is a pile (lake) of priceless, irreplaceable fossil fuel that, by any measure of the energy you get and what you pay, is all intents free, and being virtually free we have and continue to burn our way through it as fast as we possibly can. It is the tragedy of the (fossil fuel) commons.…

- Softcover
Anbieter: Books Puddle, Woodside, NY, USABooks Puddle
Verkäufer/-in kontaktierenVerkäufer/-in mit 4 SternenZustand: Neu
EUR 237,45
EUR 3,56 VersandVersand innerhalb von USAAnzahl: 4 verfügbar
Zustand: New. pp. 570.

- Hardcover
Anbieter: Books Puddle, Woodside, NY, USABooks Puddle
Verkäufer/-in kontaktierenVerkäufer/-in mit 4 SternenZustand: Neu
EUR 241,47
EUR 3,56 VersandVersand innerhalb von USAAnzahl: 4 verfügbar
Zustand: New. pp. 572.

Light, Water, Hydrogen: The Solar Generation of Hydrogen by Water Photoelectrolysis
GRIMES, CRAIG (Editor) / VARGHESE, OOMMAN (Editor) / RANJAN, SUDHIR (Editor)
- Softcover
Anbieter: Revaluation Books, Exeter, Vereinigtes KönigreichRevaluation Books
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 245,76
EUR 14,93 VersandVersand von Vereinigtes Königreich nach USAAnzahl: 2 verfügbar
Paperback. Zustand: Brand New. 568 pages. 9.25x6.10x1.28 inches. In Stock.

- Softcover
- Print-on-Demand
Anbieter: Brook Bookstore On Demand, Napoli, NA, ItalienBrook Bookstore On Demand
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 126,26
EUR 8,00 VersandVersand von Italien nach USAAnzahl: Mehr als 20 verfügbar
Zustand: new. Questo è un articolo print on demand.

- Hardcover
- Print-on-Demand
Anbieter: BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, DeutschlandBuchWeltWeit Ludwig Meier e.K.
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 160,49
EUR 23,00 VersandVersand von Deutschland nach USAAnzahl: 2 verfügbar
Buch. Zustand: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This book covers the field of solar production of hydrogen by water photo-splitting (photoelectrolysis) using semiconductor photoanodes. The emphasis of the discussion is on the use of nanotechnology in the field. The theories behind photocatalysis and photoelectrochemical processes responsible for hydrogen production are given in detail. This provides a state-of-the-art review of the semiconductor materials and methods used for improving the efficiency of the processes. The book also gives an account of the techniques used for making the nanostructures. 572 pp. Englisch.…

- Softcover
- Print-on-Demand
Anbieter: BuchWeltWeit Ludwig Meier e.K., Bergisch Gladbach, DeutschlandBuchWeltWeit Ludwig Meier e.K.
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 160,49
EUR 23,00 VersandVersand von Deutschland nach USAAnzahl: 2 verfügbar
Taschenbuch. Zustand: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This book covers the field of solar production of hydrogen by water photo-splitting (photoelectrolysis) using semiconductor photoanodes. The emphasis of the discussion is on the use of nanotechnology in the field. The theories behind photocatalysis and photoelectrochemical processes responsible for hydrogen production are given in detail. This provides a state-of-the-art review of the semiconductor materials and methods used for improving the efficiency of the processes. The book also gives an account of the techniques used for making the nanostructures. 568 pp. Englisch.…

- Hardcover
- Print-on-Demand
Anbieter: moluna, Greven, Deutschlandmoluna
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 136,16
EUR 48,99 VersandVersand von Deutschland nach USAAnzahl: Mehr als 20 verfügbar
Gebunden. Zustand: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Focus is on development of a useful, cost-effective photochemically stable material system for water photoelectrolysis Addresses three fundamental material science challenges: the need for renewable, portable and non-polluting source of energy, th.…

- Softcover
- Print-on-Demand
Anbieter: moluna, Greven, Deutschlandmoluna
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 136,16
EUR 48,99 VersandVersand von Deutschland nach USAAnzahl: Mehr als 20 verfügbar
Zustand: New. Dieser Artikel ist ein Print on Demand Artikel und wird nach Ihrer Bestellung fuer Sie gedruckt. Focus is on development of a useful, cost-effective photochemically stable material system for water photoelectrolysis Addresses three fundamental material science challenges: the need for renewable, portable and non-polluting source of energy, th.…
Weitere Bilder- Hardcover
- Print-on-Demand
Anbieter: preigu, Osnabrück, Deutschlandpreigu
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 141,20
EUR 70,00 VersandVersand von Deutschland nach USAAnzahl: 5 verfügbar
Buch. Zustand: Neu. Light, Water, Hydrogen | The Solar Generation of Hydrogen by Water Photoelectrolysis | Craig Grimes (u. a.) | Buch | Einband - fest (Hardcover) | Englisch | 2007 | Springer US | EAN 9780387331980 | Verantwortliche Person für die EU: Springer Nature Customer Service Center GmbH, Europaplatz 3, 69115 Heidelberg, productsafety[at]springernature[dot]com | Anbieter: preigu Print on Demand. …

- Softcover
- Print-on-Demand
Anbieter: buchversandmimpf2000, Emtmannsberg, BAYE, Deutschlandbuchversandmimpf2000
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 160,49
EUR 60,00 VersandVersand von Deutschland nach USAAnzahl: 1 verfügbar
Taschenbuch. Zustand: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In addition to domestic animals the earliest records of mankind indicate that slavery, until the use of coal became widespread, has always been a significant aspect, or part, of nearly every society. Consider for example ancient Attica (Greece), in which 115,000 out of a total population of 315,000 were slaves [1]. For the lucky rulers slaves represented power, Joule/second or Watt. On a steady state basis a healthy adult generates about 100 Watts, or 100 J/s, while a highly conditioned endurance athlete can generate about 300 W for perhaps an hour. Today we obtain our energy from fossil fuels, that magical brew of latent-heat chemistry that allows us to run the world without having to rely on people or domestic animal power. We owe much if not all of modern civilization to fossil fuels, no more than stored solar energy, which provide the 40-plus Terawatts that annually powers the 7,000,000,000 people on this planet, with our fossil fuel burn rate growing to accommodate the annual increase of some additional 100,000,000 or so souls. The foundation of modern society is a pile (lake) of priceless, irreplaceable fossil fuel that, by any measure of the energy you get and what you pay, is all intents free, and being virtually free we have and continue to burn our way through it as fast as we possibly can. It is the tragedy of the (fossil fuel) commons.Springer-Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 568 pp. Englisch.…

- Hardcover
- Print-on-Demand
Anbieter: buchversandmimpf2000, Emtmannsberg, BAYE, Deutschlandbuchversandmimpf2000
Verkäufer/-in kontaktierenVerkäufer/-in mit 5 SternenZustand: Neu
EUR 160,49
EUR 60,00 VersandVersand von Deutschland nach USAAnzahl: 1 verfügbar
Buch. Zustand: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In addition to domestic animals the earliest records of mankind indicate that slavery, until the use of coal became widespread, has always been a significant aspect, or part, of nearly every society. Consider for example ancient Attica (Greece), in which 115,000 out of a total population of 315,000 were slaves [1]. For the lucky rulers slaves represented power, Joule/second or Watt. On a steady state basis a healthy adult generates about 100 Watts, or 100 J/s, while a highly conditioned endurance athlete can generate about 300 W for perhaps an hour. Today we obtain our energy from fossil fuels, that magical brew of latent-heat chemistry that allows us to run the world without having to rely on people or domestic animal power. We owe much if not all of modern civilization to fossil fuels, no more than stored solar energy, which provide the 40-plus Terawatts that annually powers the 7,000,000,000 people on this planet, with our fossil fuel burn rate growing to accommodate the annual increase of some additional 100,000,000 or so souls. The foundation of modern society is a pile (lake) of priceless, irreplaceable fossil fuel that, by any measure of the energy you get and what you pay, is all intents free, and being virtually free we have and continue to burn our way through it as fast as we possibly can. It is the tragedy of the (fossil fuel) commons.Springer-Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 572 pp. Englisch.…

- Softcover
- Print-on-Demand
Anbieter: Majestic Books, Hounslow, Vereinigtes KönigreichMajestic Books
Verkäufer/-in kontaktierenVerkäufer/-in mit 4 SternenZustand: Neu
EUR 251,28
EUR 7,76 VersandVersand von Vereinigtes Königreich nach USAAnzahl: 4 verfügbar
Zustand: New. Print on Demand pp. 570 49:B&W 6.14 x 9.21 in or 234 x 156 mm (Royal 8vo) Perfect Bound on White w/Gloss Lam.

- Hardcover
- Print-on-Demand
Anbieter: Majestic Books, Hounslow, Vereinigtes KönigreichMajestic Books
Verkäufer/-in kontaktierenVerkäufer/-in mit 4 SternenZustand: Neu
EUR 254,26
EUR 7,76 VersandVersand von Vereinigtes Königreich nach USAAnzahl: 4 verfügbar
Zustand: New. Print on Demand pp. 572 Illus.