Creator
- Roy G. Neville Historical Chemical Library1
- Royster, P. H. (Percy Hoke), 1888-19661
- Rubber Growers' Association1
- Rumford Company1
- Runge, F. F. (Friedlieb Ferdinand), 1795-18671
- Russell Brothers1
- Russell, Alexander S. (Alexander Smith), b. 18881
- S. W. Partridge & Co.1
- Sabin, Alvah Horton, 1851-19401
- Saint Catherine Press (London, England)1
- Salter, Lawrence C.1
- Schellen, Heinrich, 1818-18841
- Schenberg, Samuel1
- Schimmelwitz, P.1
- Schädlich & Jakob1
- Science History Institue1
- Scott, Greenwood & Son1
- Secchi, Angelo, 1818-18781
- Sellers, Coleman, 1827-1
- Sevier Press1