The cholesteric pitch of mixtures of cholesteryl nonanoate and cholesteryl chloride has been measured as a function of temperature and concentration. The results are extrapolated to yield the intrinsic pitch of pure cholester nonanoate and its temperature coefficient. It is argued that this knowledge of the intrinsic pitch is important in analyzing the pitch divergence near the smectic-A transition.
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* Work supported by the National Science Foundation under Grant GH-33633 and a DuPont Young Faculty Grant.