Several achiral rigid rod solutes were dissolved in two different cholesteric liquid crystalline solvents, and pitch measurements were made by the Cane wedge, droplet and fingerprint methods. In the first two techniques, no effect of the achiral solutes on the pitch occurs at low concentration. Although some regimes of the samples prepared by the fingerprint technique show pitch shortening in the presence of some of the achiral solutes,the overall conclusion is that, contrary to previous reports, there appears to be no convincing evidence for the induction of preferred conformations in achiral solutes.