developed by American chemists Lloyd F. Henderson and Ernest C. Crocker, a theory which claims four main facets of odor: caprylic, burnt, fragrant, and acis. The existence of each facet within an odor is judged on a 9-point scale that expresses the general intensity of all four facets.

CROCKER-HENDERSON ODOR SYSTEM: “There are four main components comprising the Crocker-Henderson odor system.”
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