Profile portrait of Alexander von Humboldt, with "Alexander von Humboldt/1769 - 1859" around perimeter.

Glass color transparency of William Welch seated outdoors in a chair. Presented with the papers of Simon Flexner (APS Library).

Obverse: Overlapping profiles of man and woman with allegorical figure to the right, holding a branch and gesturing to a building at top. Reverse: crest with "HELSINGIENSIS VNIVERSITAS" around perimeter and "T.H. DOBZHANSKY 1967" on outer rim.

Half-length figure seated on a red upholstered chair, with body turned left and head facing forward. He wears a coat, waistcoat, and neckcloth. Brown background.

Oval, frontal portrait bust of John Fothergill in center with "JOHN FOTHERGILL. MD.F.R.S." outside bottom perimeter. Signed "Rd. Livesay pincr" and "F. Bartolozzi sculp" along bottom perimeter. At bottom in script: "Cui suas artes, sua dona laetus Et herbam et Venae salientis ictum Scire concessit, celerem et medendi Delius usum." "From a Bust in the Possession of Dr. Lettsom" at bottom. In gilt, wooden frame under glass.

Steel engraved plate with portrait of Simon Newcomb and signature.

Plaster death mask of a subject with full beard and moustache. The mask is a thick, hollow cast. Unsigned and undated.

Obverse: classical female figure standing with shield marked "NATIONAL INSTITUTE OF SOCIAL SCIENCES" Reverse: bas-relief of torch; "NATIONAL INSTITUTE OF SOCIAL SCIENCES" around perimeter; "DIGNUS HONORE EDWIN G. CONKLIN " at center.

Miniature bust of Georges-Louis Leclerc, Comte de Buffon. The bust is cast in bronze in two pieces. "BUFFON" is stamped in block letters on the side of the circular base. There are no identifying maker’s marks. This object is similar to another miniature bust in the APS collection (01.C.58) marked "CUVIER".

Bust-length, oval portrait with body turned slightly to the left, in front of a gray background. The subject has powdered or gray hair, brown eyes, and a pale complexion. He wears a blue damask banyan, a waistcoat with gold, braided edges, and a white neckcloth. The miniature portrait is set in a gold locket with blue enamel backing surrounding a pearl oval which holds a glass covering for an arrangement of hair. Unsigned and undated.

Bas-relief profile portrait of Antoine Laurent Lavoisier at center. "Lavoisier, membre du lycée des arts" around top perimeter in script.