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Title: Don't waste you money on this book.
Review: I read this book and got nothing out of it. It's theories and "techniques" are vague and scientifically unsound. (Bates originally wrote this book in -> ! 1891 ! <- , and it was republished in 1940!) It consists of anecdotes and pseudo-scientific terms in a verbose, repetitive style. In my opinion, this book could easily have been condensed into a 10-page pamphlet.
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