[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.