Literary notes about mercurial (AI summary)
The term "mercurial" is employed with a dual significance in literature. On one hand, it describes characters or moods that are volatile, changeable, and unpredictable, as seen in references to a "mercurial temperament" that requires firmness [1] or in the portrayal of individuals whose quicksilver nature infuses their spirit with energy and caprice [2], [3]. On the other hand, it is used in more technical or medicinal contexts to denote substances or instruments involving mercury, such as in formulations of ointments [4], or in devices like thermometers and barometers that rely on the element's physical properties [5], [6]. This versatile usage allows authors to evoke both the elusive, dynamic quality of human nature and the distinct characteristics of mercury-based materials.