2 adjectives to describe speculum

The rest of us were always at the surface of things,even the naturalists were only engaged with their anatomy; but Emerson in the forest, or looking at the sunset from the lake, seemed to be looking through the phenomena, studying them by their reflections on an inner speculum.

I had, however, a mouth-speculum which also acted as a gag, and, having propped the patient's mouth open with this, I hastily slipped off one of the rubber tubes from my stethoscope and inserted into one end of it a vulcanite ear-speculum to serve as a funnel.

2 adjectives to describe  speculum