Box 15

Scope and Contents From the Series: There are 9 boxes of photographs arranged by size: 8 x 10 (1 box), 5 x 7 (6), and 4 x 5 (2). The collection includes photos by Pirone and associates as well as stock photos of chemical products and tree maintenance companies, including Monsanto Corporation and U.S. Rubber Company, for which Dr. Pirone respectively tested “Krillium” and “Rapidgro” products. The photographic record documents controlled experiments, development of methods (air-layering) and devices (aeropropagator) for...