(1) Taken from (a) in large part the Ph. D. Thesis of Lawrence L. Landucci, University of Minnesota, March 1967; Diss. Abstr. 6, 28, 3223-3224 (1968); and (b) the graduate research of James C. Darling, 1977-1978.(c) We are indebted to Mary Beth Seidlitz for an extensive literature review of triboluminescence.