[N] Thomson’s Chemistry of Organic Bodies: Vegetables, p. 667.
[O] Vere magna et longe pulcherrima sunt etiam illa profundissimâ sapientiâ hic exstructa opera tua, O Jehovah! quæ non nisi bene armatis nostris oculis patent! Qualia autem erunt denique illa, quæ sublato hoc speculo, remotâ mortalitatis caligine daturus es tuis Te vere sincero Pectore colentibus? Eheu qualia! Hedwig.
[P] Thomson’s Chemistry. Vegetables, p. 630.
[Q] On the Culture and Uses of Potatoes, by sir John Sinclair, bart. This is a subject becoming every year of greater moment, and attention to it a national benefit. The reduction of bulk alone, facilitating the transport from one place to another, is an essential gain. The produce, from a certain number of acres of this valuable esculent, may be greatly augmented by planting the potatoes whole, at a great distance between each, and hoeing freely between them—See Knight’s Papers in Horticultural Transactions, and Payen et Chevalier, Traité de la Pomme de Terre. Paris, 1826, p. 17.
[R] Humboldt. Personal Narrative, vol. iv. p. 84.
[S] “Among the plants cultivated by man, the sugar-cane, the plantain (musa), the mammee-apple (mammea), and alligator-pear-tree (laurus persea) alone have the property of the cocoa-nut-tree, that of being watered alike with fresh and salt water. This circumstance is favorable to their migrations; and if the sugar-cane of the shore yield a syrup that is a little brackish, it is believed at the same time to be better fitted for the distillation of spirit, than the juice produced from the canes of the interior.”—Humboldt.
[T] “The quantity of these insects is incredible to all who have not themselves witnessed their astonishing numbers; the whole earth is covered with them for the space of several leagues. The noise they make in browsing on the trees and herbage may be heard at a great distance, and resembles that of an army in secret. The Tartars themselves are a less destructive enemy than these little animals. One would imagine that fire had followed their progress. Wherever their myriads spread, the verdure of the country disappears; trees and plants stripped of their leaves and reduced to their naked boughs and stems cause the dreary image of winter to succeed in an instant to the rich scenery of spring. When these clouds of locusts take their flight, to surmount any obstacles, or to traverse more rapidly a desert soil, the heavens may literally be said to be obscured by them.”
[U] “As the native of a northern country, little favoured by nature, I shall observe that the Marche of Brandebourg, for the most part sandy, nourishes, under an administration favourable to the progress of agricultural industry, on a surface only one-third that of Cuba, a population nearly double.”—Humboldt, P. N., vol. vii. p. 156.
[V] Loudon’s Arboretum Britannicum, vol. i., p. 412.
[W] For an interesting account of sugar, see Humboldt, Nova Genera et Species Plantarum, vol. i., p. 243.