Attached to heavy paper so only one side of medal is visible. Obverse: three overlapping bas-relief profile portraits of Benjamin Rush, Philip Syng Physick, and Caspar Wistar Reverse: not visible Acquired along with the papers of Charles Willson Peale and family, 1945 (APS Library).

Obverse: profile portrait of Edward Jenner between "1796" and "1896"; "VACCINATION MAY 14th" at top and "JENNER" at bottom. Reverse: asclepius/caduceus; "Medical Society of the County of Kings" around perimeter.

Obverse: Carolus Linnaeus sitting in landscape; "E. TENEBRIS . TANTIS . TAM . CLARUM . EXTOLLERE . LUMEN . QUI . PRIMUS . POTUIT" around image and "ERIK LINDBERG" at bottom. Reverse: bas-relief profile portrait of Linnaeus and flora, fauna, and star flanked by three crowns; "CAROLUS . LINNAEUS . NAT . MDCCVII . OB . MDCCLXXVIII" around profile and "MEMORIAM . BISAECULAREM / PIE . CELEBRANS / RACAD . SCIENT . SUEC . MCMVII."

Obverse: bas-relief profile portrait of John J. Carty; "NATIONAL ACADEMY OF SCIENCES" around perimeter. Reverse: "THE JOHN J. CARTY MEDAL FOR THE ADVANCEMENT OF SCIENCE" and raised rectangle bearing "EDWIN G. CONKLIN 1943."

Obverse: bas-relief profile portrait of Charles Lyell; "CHARLES LYELL" at sides, "1873" at bottom, and "L.C. WYON F" under portrait. Reverse: landscape with scene of classical ruins, i.e., three columns and aqueduct. Edge: "THE GEOLOGICAL SOCIETY OF LONDON TO JOSEPH LEIDY, M.D., 1884."

Obverse: bas-relief profile portrait of John Napier; "IOANNES NEPERUS DE MERCHISTON" around profile and "C.F. CARTER SCULP." under profile. Reverse: olive wreath encircles "INGENII / FELICITER EXCULTI / PRAEMIUM / KEITHIANUM;" "ADJUDICAVIT SOC : REG : EDIN :" around perimeter.

Obverse: bas-relief profile portrait of Louis Pasteur; "LOUIS PASTEUR" along perimeter, and "D. Roly" to right of profile. Reverse: "CENTIEME ANNIVERSAIRE / DE LA / NAISSANCE / DE / PASTEUR / 17 DECEMBRE / 1822-1922."