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, 3/4 portrait bust of Peter Collinson in center with "PETER COLLINSON. F.R.S. SAS." outside bottom perimeter. Signed "Trotter. S." at bottom right, under portrait. At bottom in script: "Hinc, quce Natura negabat Visibus humanis Oculis ca Pectoris hausit. Cumque Animo, it vigili perspescerat omnia cura; In medium discenda dabat." In gilt, wooden frame behind glass.

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.

Marble portrait bust with bare shoulders and upper chest. The subject has wavy, cropped hair and a stern expression. "D. RITTENHOUSE" inscribed on the base. "DE FACIE PHILADELPHIAE / EX ECTIPO FLORENTIAE / FACIEBAT JOS. CERACCHI / CIDDCCLXXXXIV" incised on verso.

Obverse: profile portrait of Humboldt. Reverse: unidentified symbol between "ALEXANDER / VON HUMBOLDT / 14.9.1769 6.5.1859" and "S. SCHüTZ 1967"

Profile portrait of Joseph Banks, white on black jasper dip. "SIR JOSEPH BANKS" at bottom, "WEDGWOOD/O" impressed on back. Possibly after 1779 model by John Flaxman.

Profile portrait of Joseph Priestley, white on green jasper dip. "PRIESTLEY" at bottom. "Wedgwood/O" on back. After c. 1776 bust by Giuseppe Ceracchi.

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.

Seated figure in a Chippendale-style chair is shown to below the waist, his body turned to the left. The subject's hands are crossed on the table in front of him and he holds a red pencil in his right hand, with which he gestures at notepaper with a diagram. His hair and eyes are gray and he has a rosy complexion. The subject wears a brocade banyan with rose lining, a white, buttoned waistcoat, and a white neckcloth, collar, and ruffle. The background is a shaded, greenish-gray. Unsigned and undated.

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

Profile portrait of Isaac Newton, white on black jasper dip. "NEWTON" at bottom, "Wedgwood/O" on back. Possibly after 1787 model attributed to James Hoskins and Benjamin Grant, which is after bust by Louis-Francois Roubillac.