Fig. 4. Dose-response curves to test doses of three aliphatic acetates (A, butyl; B, pentyl; C, hexyl), showing mean response indices (N=8-16) and standard errors (error bars are sometimes smaller than the symbols used in the graph). Dotted line, control (no pre-stimulation). Solid line, following pre-stimulation with the same odour as the test odour. For full details, see text.