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If you're black in America, at some point you may have wondered where you would be, on a spiritual level, if not for the slave trade. If the answer to that question makes you uncomfortable, ask yourself why. If you're interested in exploring the secrets Christianity and other religions have kept hidden, this book is for you.

This edition of a very successful and widely adopted book has been brought up-to-date with computer methods and applications throughout. It makes use of spreadsheet programs, and contains unique procedures that have never appeared before in any gas dynamics book. KEY TOPICS Chapter topics include basic equations of compressible flow., wave propagation in compressible media, isentropic flow of a perfect gas, stationary and moving normal shock waves, oblique shock waves, flow with friction and with heat addition or heat loss, equations of motion for multidimensional flow,...

This book, prepared by academics and practitioners, explores the various subjects that comprose the homeland security discipline in a post-9/11 environment, including administration, intelligence, emergency management, terrorism and counterterrorism, environmental security, public health, and much more.

The first book devoted exclusively to the spectroscope and its use in gemstone identification.

Until 1933 the refractometer and the microscope were the two principal tools in gem testing. Then B.W. Anderson introduced the hand spectroscope which quickly became the third vital instrument for the UK gemmologist. The publication of Anderson's papers in the mid-1950s alerted gem laboratories worldwide to the importance of this instrument. Today its use is universal.

Anderson and his lifelong colleague, Payne, both of the world's first full-time gemmological laboratory, were...