Wedell, C. H. (1936). The taste sensitivity of the white rat. I. Sensitivity to quinine sulphate. Journal of Comparative Psychology, 21(2), 233-244.
http://dx.doi.org/10.1037/h0056674
The white rat was found to possess sensitivity for quinine sulphate about equivalent to that of man. The animals were given a choice between tap water and solutions of quinine sulphate placed side by side in their cages in similar containers which were shifted in right-left position on alternate days. The order of presentation of the solutions, from weak to strong or from strong to weak, varied for different groups. Measurement of thresholds was in terms of the amount of quinine sulphate solution consumed. Threshold concentrations in per cent by weight varied from .000375 to .001563. Bibliography. (PsycINFO Database Record (c) 2016 APA, all rights reserved)