In The Birthmark, what are the figures of speech which are used to describe the laboratory?
The narrator uses a metaphor to describe the intellectual, intangible reaches of Aylmer's studies in this laboratory. A metaphor is a comparison of two unalike things where one thing is said to be another. The narrator says,
Seated calmly in this laboratory, the pale philosopher had investigated the secrets of the highest cloud region and of the profoundest mines [...].
The heights and the depths of Aylmer's study in this place are compared to "highest cloud region[s]" and "profoundest mines," respectively. Nature is also personified as a woman who purposely "assimilates all her precious influences from earth and air" in order to assist humankind, which is her finest creation. Personification is the attribution of human qualities to something that is not human. Nature is also personified as a "creative Mother" who keeps her own secrets despite her apparent candor.
There is, also, a great deal of visual and even olfactory imagery in the narrator's description of Aylmer's rooms:
check Approved by eNotes Editorial