SCIENCE, MEDICINE, INVENTION

ALBERT B. SABIN SIGNED PHOTO AM. MEDICAL RESEARCHER DEV. ORAL POLIO VACCINE

ASTRONOMER RICHARD A. PROCTOR HANDWRITTEN LETTER SIGNED ON SCIENCE AND RELIGION

CHARLES A. EASTMAN, OHIYESA SIGNED CARD BY NATIVE AMERICAN AUTHOR, PHYSICIAN & REFORMER - BOY SCOUTS OF AMERICA

CLARA BARTON HISTORIC AUTOGRAPH LETTER SIGNED WITH AMERICAN RED CROSS CONTENT

D. CARLETON GAJDUSEK SIGNATURE WINNER NOBEL PRIZE 1976 PHYSIOLOGY OR MEDICINE

DICKINSON W. RICHARDS SIGNED & DATED ON PRESCRIPTION FORM-NOBEL PRIZE CARDIAC CATHETERIZATION

EARLE OVINGTON SIGNED FIRST DAY ISSUE POSTAL COVER FOR THE TWENTIETH ANNIVERSARY OF HIS FIRST AIR MAIL FLIGHT ON SEPTEMBER 23, 1911

EDWARD P. ROE SIGNED SLIP AMERICAN AUTHOR, PASTOR, HORTICULTURIST

EDWARD TELLER SIGNED FIRST DAY COVER BY THE FATHER OF THE HYDROGEN BOMB

FRANCIS PARKMAN HANDWRITTEN LTR SIGNED HISTORIAN AUTHOR OREGON TRAIL

FREDERICK AUGUSTUS PORTER BARNARD SIGNED SLIP DEAF PRES. COLUMBIA & OLE MISS

FREDERICK AUGUSTUS PORTER BARNARD SIGNED SLIP PRES COLUMBIA & OLE MISS, WOMEN'S RIGHTS, BLACKS