This section is from "The Domestic Encyclopaedia Vol2", by A. F. M. Willich. Amazon: The Domestic Encyclopaedia.
Emollients are those medieines which are supposed to soften and relax the fibres of the body, either by mechanically distending such as before were too closely, that is, preternaturally combined ; or, by penetrating into the interstices of the elementary fibres, and supplying those particles, from a deficiency of which they were too intimately united. Among the remedies of the former class are chiefly heat, and all unctuous applications; such as lard, wax, fat of venison, etc. : to the latter belong all juicy, mucilaginous, and saccharine substances, serving both as nutriment and medicines. Of this description are the expressed vegetable oils, fresh butter, decoctions of the marsh-mallows, infusions of linseed, etc.
Emollients are indicated : 1. When the fibres are in too rigid a state; 2. When they are spasmodically contracted ; 3. In all active inflammations ; and 4. In obstinate costiveness, or accumulations of feces in the intestines.
 
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