D. degree that he never put to use.
In both 1872 and 1873 James was offered teaching positions at Harvard University. Rather than starting right away, James postponed teaching to travel around Europe. Finally, in 1875 James began teaching psychology and also established the first American psychology lab. Up until this time, there were no professors of psychology in American universities. No single academic subject could hold Williams interest. Between 1873 and 1875 James switched from physiology to psychology and in 1879 he switched again, this time to philosophy. In 1880 James became the assistant professor of philosophy at Harvard University and continued teaching psychology as well. After only five years as an assistant professor, in 1885 James became a professor of philosophy. For many years James struggled with the inability to find his calling in life, which often led to him being severely depressed.
In 1878 James married Alice Howe Gibbens and began work on his book "The Principles of Psychology". Twelve years after he began writing it, in 1890 James, along with Henry Holt of Boston, published the book "Principles of Psychology". At the urging of his publisher to create a book with greater classroom appeal, James combined the two-volume book into one. This book was titled "Psychology: The Briefer Course". In many ways the two-volume work was as much psychology as it was philosophy.
Distribution of the two-volume textbook began later that year. Although Principles was.
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admired by many, and had many positive reviews, some critics found the book to be too personal in tone and substance. Numerous chapters in Principles were devoted to habit, attention, perception, association, memory, reasoning, instinct, emotion, imagination, psychological methods, and even hypnotism.
