The western lands acquired from by the US from Great Britain after the Revolutionary War were divided into slave and free states, a compromise which precipitated the US Civil War. Drawing on contemporary letters and documents, this detailed analysis re-examines the Northwest Ordinance and how Congress silently permitted the South's "peculiar institution" to move westward.
Presents a study of the life and works of Alan Dower Blumlein, one of Britain's important inventors. During the WWII, Alan Blumlein was engaged in the work of radar development which eventually became the blind bombing radar. This book describes his patents and the process behind them, and presents the developments in audio, electronics and radar.
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