Image Number D4750-1
Mary Hunt, believed to be on the left, with a fellow worker inside Peoria's USDA Northern Regional Research Laboratory, ca. 1943. They are examining agar plates of bacteria exposed to penicillin as part of a worldwide survey effort to find Penicillium mold strains that produced the highest amounts of the antibiotic.
Photo by USDA.
640 pixels wide: (D4750-1.jpg)
Please visit our Image Gallery.