by F. W. H. (Frederic William Henry) Myers
by Henry Fleetwood
by John Fiske
by Alfred Wiedemann
by George Andrew Reisner
by John Fiske
by M. M. (Mangasar Mugurditch) Mangasarian
by Gustav Theodor Fechner
by Henry Drummond
by Maurice Maeterlinck
by Clifford Herschel Moore
by James Challis
by Arthur Schopenhauer