. . . . . "Letters on od and magnetism"@en . . . "Reichenbach's Letters on od and magnetism (1852) : published for the first time in English, with extracts from his other works, so as to make a complete presentation of the odic theory"@en . . . . "Reichenbach's Letters on Od and Magnetism <1852> : Published for the first time in English, with extracts from his other works, so as to make a complete presentation of the odic theory. Translated Text, Introduction, with Biography of Baron Carl von Reichenbach, Notes, and Supplements by F.D. O\"Byrné" . . .