[1]. On the Principal Causes of the Variation of Temperature upon the Earth.
[2]. With a copy of “Views of Nature,” new edition.
[3]. The memoranda were intended to be communicated to Professor Hegel, who was told that Humboldt had indulged in attacks on Philosophy in his lectures.
[4]. It was a book of Ranke (the Historian).
[5]. Biography of Count Zinzendorf by Varnhagen.—Translator.
[6]. Humboldt wrote a very illegible hand, hence this allusion.—Translator.
[7]. Memoirs of John Benjamin Ehrhard, Philosopher and Physician. Edited by Varnhagen von Ense. Stuttgart and Tubingen. Cotta. 1830.
[8]. Goethe.—Translator.
[9]. Of Rahel’s death.