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.
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David and Yola Coffeen both have enjoyed academic careers, as planetary astronomer and as linguist/educator. But since 1982 (yes, 1982!) they have been full-time dealers in early scientific and medical instruments, under the name Tesseract. Selling primarily by catalogue (over 100 issued so far) they also have a web presence at www.etesseract.com, and can be contacted at email@example.com.