Isaac Arthur Abt, pediatrician and Northwestern University Medical School professor, began his practice in internal medicine but gravitated to pediatrics, with a particular intererst in nutrion, and became one of the earliest specialists in the field. The Isaac Arthur Abt Papers are arranged in six main categories: biographical material; class and teaching notes; publications; addresses; clinics; and material by or related to I. A. Abt's elder son, Arthur Frederick.

Two notebooks of lecture notes kept by John M. Mitchell for William A. Locy's zoology course at Northwestern University (1911-12) and Isaac A. Abt's pediatrics course at Northwestern University Medical School (1915-16), and accompanying materials.