DEEP-CELL ANATOMICAL INJECTION BY THE MASTER, English, mid-19th century, hand-signed in diamond writing “Hett” and with the specimen identification “Choroid Coat of the Eye of the Ox.” Mounted on the standard 1″ x 3″ glass microscope slide is Hett’s distinctive square black cell with deep central circular glazed cavity containing the red injected tissue, fluid, and his mandatory air bubble. Condition is very fine.

Alexander Hett specialized in preparing deep-cell fluid mounts, of a quality “unsurpassed by any other fluid-mounted opaque specimens from any source.” (Bracegirdle, A History of Microtechnique, 1998). A fine signed example.