Subject
- Portraits63
- Potash1
- Potash industry and trade1
- Public health2
- Queeny, Edgar M. (Edgar Monsanto), 1897-19684
- Queeny, John Francis, 1859-19331
- Radioimmunoassay1
- Rafferty, James A., 1886-19511
- Rand, William M., 1886-19812
- Refrigeration and refrigerating machinery--Research1
- Remsen, Ira, 1846-19271
- Research, Industrial4
- Rubber1
- Saccharin1
- Sadtler, Samuel Philip, 1847-19231
- Sadtler, Samuel Schmucker, 1873-19541
- Samuel P. Sadtler & Son2
- Sanitation1
- Schuepphaus, Robert C.1
- Scientists1