The effect of his scientific budget-planning was that he felt at once triumphantly wealthy and perilously poor, and in the midst of these dissertations he stopped his car, rushed into a small news-and-miscellany shop, and bought the electric cigar-lighter which he had coveted for a week.
There are no more uses of "dissertation" in the book.
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She wrote her dissertation on T.S. Eliot.
Oliver Stone used the dissertation as the basis for his film, "JFK".