- Jacoby in Rhein.
- Prou (1886) and C. Jacoby (1885-1891); Opuscula by Usener and Radermacher (1899); Eng.
- Jacoby, L.
- Jacoby, Neutest.
- Jacoby, Das geograph.
- Outside the English-writing world, identical or kindred tendencies are represented in France by Leroy, Poincare, Bergson, Milhaud, Blondel, Duhem, Wilbois, Pradines; in Germany by Mach, Ostwald, Simmel, Jerusalem, Goldscheid, Jacoby; in Italy by Papini, Prezzolini, Vailati, Troiano.