This volume covers rigid airships from their beginnings in 19th-century Germany until World War II and examines their role in both civil and military aviation. It gives the development histories of 163 different airships constructed during that period in Germany, Britain, France and the USA.

The Spirit of 1906 by George W. Brooks is a personal account of the 1906 earthquake in San Francisco. At 5:12 a.m. PST on Wednesday, April 18, 1906, the coast of Northern California was struck by a major earthquake with an estimated moment magnitude of 7.9 and maximum Mercalli intensity of XI (Extreme). High-intensity shaking was felt from Eureka on the North Coast to the Salinas Valley, an agricultural region to the south of the San Francisco Bay Area.

This is a book about how humans learn. Our focus is on classroom learning although the principles are, as the name of this book indicates, universal. We are concerned with learning from pre-school to post-graduate. We are concerned with most bu- ness, industrial and military training. We do not address how infants learn how to speak or walk, or how grown-ups improve their tennis swing. We do address all learning described by the word “thought”, as well as anything we might try to teach, or instruct in formal educational settings. In education, the words theory and model imply conjecture. In science, these same words imply something that is a testable explanation of phenomena able to predict outcomes of experiments. This book presents a model of learning that the authors offer in the sense of scientists rather than educators. Conjecture implies that information is incomplete, and so it surely is with human learning. On the other hand, we assert that more than enough is known to sustain a “scienti?c” model of learning. This book is not a review of the literature. Instead, it is a synthesis. Scholars and many teachers likely have heard much if not most or even all of the information we use to develop the uni?ed learning model. What you have not read before is a model putting the information together in just this way; this is the ?rst one.

Highly readable and packed with instructional photos and drawings, this book also features a separate kit for practicing lens edging layout at home. Proficiency tests for self-assessment are included for each chapter and are an excellent review for examinations. - Seven new chapters cover changes in the lens industry, lens insertion, rimless and semi-rimless frames, and lens tinting and engraving - Contains a centration skills booklet for practicing lens edging layout - Proficiency tests for self-assessment included with each chapter - Content has been completely updated, reorganized and expanded to include the most recent industry changes. - Updated photos illustrate the most current types of lenses and enhance comprehension of lens finishing. - Seven new chapters cover rimless and semi rimless frames; environmental and safety concerns; lens insertion and standard alignment; nylon cord and other groove mountings; lens tinting and engraving; progressive addition lenses; and lens impact and resistance testing. - An appendix of specific British Standards allows the book to easily travel to the UK and other countries that fashion their dispensing programs after the UK model. - The Lens Centration Skills Series provides exercises to practice lens finishing and reinforce material from the text.

Traces the development of the subway from its inception to its decline as an overcrowded and dangerous part of city life - Explores how it has been represented in film and art - Gives women's experiences of the subway - Examines the city's racial tensions - Skyscapers - Spatial layout of the city - Urban space.