***** To join INSNA, visit http://www.insna.org ***** Thomas Although this isn't quite what you are looking for, in the 1990-1991 time frame I interview (along with Everett Rogers) a number of early pioneers of diffusion of innovations research. We published our findings in this paper: Valente, T. W., & Rogers, E. M. (1995). The origins and development of the diffusion of innovations paradigm as an example of scientific growth. Science Communication: An Interdisciplinary Social Science Journal. 16, 238-269. The abstract reads: This article traces the emergence of the basic paradigm for early diffusion research created by two rural sociologists at Iowa State University, Bryce Ryan and Neal C. Gross. The diffusion paradigm spread to an invisible college of midwestern rural sociological researchers in the 1950s and 1960s, and then to a larger, interdisciplinary field of diffusion scholars. By the late 1960s, rural sociologists lost interest in diffusion studies, not because it was ineffective scientifically, but because of lack of support for such study as a consequence of farm overproduction and because most of the interesting research questions were thought to be answered. -Tom Thomas W. Valente, PhD Professor and Interim Chair Department of Preventive Medicine Keck School of Medicine University of Southern California Soto Street Building, Suite 330 2001 N Soto Street, MC 9239 Los Angeles CA 90089-9239 Email: [log in to unmask]<mailto:[log in to unmask]> ***** To join INSNA, visit https://urldefense.proofpoint.com/v2/url?u=http-3A__www.insna.org&d=DwIFAg&c=pZJPUDQ3SB9JplYbifm4nt2lEVG5pWx2KikqINpWlZM&r=uXI5O6HThk1ULkPyaT6h2Ws3RKNKSY__GQ4DuS9UHhs&m=YIrLl1ahO0OLKxguFnRUFISsyjYV0WY-HXiOFt2zpe8&s=OCl86Ccc03CGWB849HtJgaZDqT1u8SzwsEIMikA1w24&e= ***** If one looks up the word 'diffusion' in the Dictionary of the History of Science, you get the standard explanation that 'diffusion' originated in the 19th c with Graham and Maxwell and has a Latin etymology in the word, diffundere, which means "to spread out." There has to be more to the story than this, right? Earlier references might include the "diffusion of refracted light" in Robert Greene (1727) and "diffusion of light" in Newton's Optical Lectures (1728). My question for these listservs is, does anyone have any additional insight into the history and origins of the abstract idea of 'diffusion?' Thank you, Thomas Ball _____________________________________________________________________ SOCNET is a service of INSNA, the professional association for social network researchers (http://www.insna.org). To unsubscribe, send an email message to [log in to unmask] containing the line UNSUBSCRIBE SOCNET in the body of the message.