Roger Bacon, a. [199], [226], [244].

Rohault, a. [391], [423].

Romé de Lisle, b. [318], [319], [320], [324], [328].

Römer, a. [464], [480]; b. [33].

Rondelet, b. [421].

Roscoe, b. [409].

Ross, Sir John, b. [219].

Rothman, a. [264].

Rouelle, b. [512], [515].

Rousseau, b. [401].