A basic value of ca. 18 700 kJ/kg can be used for the low heat of combustion (Van Wagner 1973; Albini1976). Specific values are available in the literature (e.g., Hough 1969; Van Wagner 1972b). Techniques for measuring fuel consumption and rate of spread will vary according to the fuel complex, expected fire behavior, logistics, etc. There is a considerable body of literature available to serve as a guide to methods design, a portion of which is cited here. Although the handbook by McRae et al. (1979) is intended for use in boreal slash fuel complexes, it provides a detailed account of the methodology for fire intensity determinations. An extensive bibliography is included as well (Alexander 1981). Obviously fire intensity is more