The sitter faces the viewer’s right in three-quarter view. He has a receding hairline with short, thin, graying hair and a prominent brow, and his right ear is visible. He is dressed in a dark overcoat and white cravat, positioned against a dark, somewhat modulated background.

Portrait with head and shoulders visible to above waist. Body slightly turned right, head facing forward. Figure wears red academic robe, brown coat and waistcoat, blue cravat. Signed "Lazar Raditz" in lower right corner. After ca. 1894 photograph.

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.

Seated three-quarter length figure, head and body turned right. Right hand holds book, and left hand holds gown. Background at left includes wooden table with books, papers, and microscope. Figures wears academic gown, black suit, tie, white shirt. Signed "H. R. Butler/ 33" on lower right corner.

Head and shoulders of subject, slightly turned right. Wears robe, dark coat, and cravat with stickpin. Dark brown background. After ca. 1899 portrait by artist, who copied a 1897 photograph.

Three-quarter length portrait. Figure seated, both hands holding large book in lap. Body turned right, facing forward. Figure wears coat and waistcoat, shirt, cravat, and red academic robe. Inscribed "Copy after S. G. Putnam" in upper right corner.

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.

Rembrandt Peale painted this half-length portrait of Robert Patterson in 1830, copying his own original 1812 portrait. Seated sideways on a chair, the subject directs his gaze toward the viewer’s left in three-quarter profile. Patterson wears a double-breasted cordovan-colored overcoat, a charcoal-colored vest, and a translucent, pleated white cravat and bow-tie. His fleshy face is rendered in detail, with naturalistically figured cheeks, jowls, eyes, and nose. The background fades from dark to light brown behind the sitter. The surface of the canvas is unusually regular; this consistency is likely the result of conservation efforts from 1937. While this portrait has been assessed as "oil-on-canvas," Peale may have used an encaustic (wax-based) medium when the APS requested the commission in 1830.