Views of nature: or Contemplations on the sublime phenomena of creation / with scientific illustrations

by Alexander von Humboldt

[HB]. Compare Arago in my Rélation hist., t. i. p. 623.

[HC]. See my Rélat. histor., t. ii. pp. 196, 626.

[HD]. Observations de Zoologie et d’Anatomie comparée, t. i. pp. 83–87, and Rélat. hist., t. ii. pp. 173–190.

[HE]. Untersuchungen über thierische Electricität, von Emil du Bois-Raymond, 1848, bd. i. s. xv.

[HF]. Reisen in Guiana und am Orinoko, s. 212.

[HG]. See my Rélat. hist. t. ii. pp. 299–304.

[HH]. See my anatomical treatise in Recueil d’Observations de Zoologie, vol. i. p. 18.

[HI]. On the Ethiopian Boa, see Diodor. Sicul., lib. iii. p. 204, ed. Wesseling.

[HJ]. Rélat. hist., t. ii. pp. 618–620.

[HK]. Historia del Rio Orinoco, nueva impr., 1791, t. i. p. 179.