Over the concluding decades of the twentieth century, the historic preservation community increasingly turned its attention to modern buildings, including bungalows from the 1930s, gas stations and diners from the 1940s, and office buildings and architectural homes from the 1950s. Conservation efforts, however, were often hampered by a lack of technical information about the products used in these structures, and to fill this gap Twentieth-Century Building Materials was developed by the U.S. Department of the Interior’s National Park Service and first published in 1995. Now, this invaluable guide is being reissued—with a new preface by the book’s original editor. With more than 250 illustrations, including a full-color photographic essay, the volume remains an indispensable reference on the history and conservation of modern building materials. Thirty-seven essays written by leading experts offer insights into the history, manufacturing processes, and uses of a wide range of materials, including glass block, aluminum, plywood, linoleum, and gypsum board. Readers will also learn about how these materials perform over time and discover valuable conservation and repair techniques. Bibliographies and sources for further research complete the volume. The book is intended for a wide range of conservation professionals including architects, engineers, conservators, and material scientists engaged in the conservation of modern buildings, as well as scholars in related disciplines.

The Gullah people are one of our most distinctive cultural groups. Isolated off the South Carolina-Georgia coast for nearly three centuries, the native black population of the Sea Islands has developed a vibrant way of life that remains, in many ways, as African as it is American. This landmark volume tells a multifaceted story of this venerable society, emphasizing its roots in Africa, its unique imprint on America, and current threats to its survival. With a keen sense of the limits to establishing origins and tracing adaptations, William S. Pollitzer discusses such aspects of Gullah history and culture as language, religion, family and social relationships, music, folklore, trades and skills, and arts and crafts. Readers will learn of the indigo- and rice-growing skills that slaves taught to their masters, the echoes of an African past that are woven into baskets and stitched into quilts, the forms and phrasings that identify Gullah speech, and much more. Pollitzer also presents a wealth of data on blood composition, bone structure, disease, and other biological factors. This research not only underscores ongoing health challenges to the Gullah people but also helps to highlight their complex ties to various African peoples. Drawing on fields from archaeology and anthropology to linguistics and medicine, The Gullah People and Their African Heritage celebrates a remarkable people and calls on us to help protect their irreplaceable culture.

As a source of reference material for the practising water engineer or water manager, this book outlines a strategy for projecting water consumption for specific types of land use and selecting a water conservation programme to maximise the beneficial use of a limited natural resource - a situation that typifies new development nationally and worldwide.