Abstract
Recent studies of scientific texts need to be set against the history of the genre, which in part establishes the institutional framework within which any individual text is created. The definition of the appropriate form of communication is part of how a discipline constitutes itself, and is part of the achievement of that discipline. This paper examines the changing features of spectroscopic articles in Physical Review since its founding. Analyses of article length, use of references, sentence length and syntax, vocabulary, graphic features, organization and argument indicate that articles become increasingly theory-based and knowledge-embedded through time. Self-consciousness about the theoretical character of argument also increases. The changing character of communication within a scientific community also has implications for the social structure of that community.
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