JAMA. 1891;XVII(11):421. doi:10.1001/jama.1891.02410890039013.
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Professor Unna gives in the Therapeutische Monatshafte the results of numerous experiments with lanoline and ointments made therefrom. Among the earlier researches of himself and others it was thought advantageous to mix water with lanoline in order to get a good base for a variety of cooling unguents, this being done for the reason that very considerable quantities of water— or aqueous solutions—could be incorporated with lanoline, and it came to be thought that these mixtures would have refrigerant properties in consequence of the continuous evaporation of their contained water, by the heat of the surface of the body. But the results did not at all confirm the hypothesis, for even if such lanoline and water ointments did appear at first to be cooling, this sensation disappeared quite rapidly and was followed by a sensation of heat. Unna then discovered that an admixture of lanoline with fats will take up


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