His sons were: Joseph (founder of the Mendelssohn banking house, and a friend and benefactor of Alexander Humboldt), whose son Alexander (d.
What is most commonly recognized in Colombia as guaco, or Vejuco del guaco, would appear to be Mikania Guaco (Humboldt and Bonpland, Pl.
The odour alone of guaco has been said to cause in snakes a state of stupor and torpidity; and Humboldt, who observed that the near approach of a rod steeped in guaco-juice was obnoxious to the venomous Coluber corallinus, was of opinion that inoculation with it imparts to the perspiration an odour which makes reptiles unwilling to bite.
1 They are particularly important in that they counteracted the popular and interestingly written books of Max Muller: for instance, Muller, like Renan and Wilhelm von Humboldt, regarded language as an innate faculty and Whitney considered it the product of experience and outward circumstance.
Humboldt, for example, defined his view of the scope of plant geography as follows:
Alexander von Humboldt (1769-1859) was the first modern geographer to become a great traveller, and thus to acquire an extensive.
The theory of geograph y was advanced by Humboldt mainly by his insistence on the great principle of the unity of nature.
The study of geography was advanced by improvements in cartography (see MAP), not only in the methods of survey and projection, but in the representation of the third dimension by means of contour lines introduced by Philippe Buache in 1737, and the more remarkable because less obvious invention of isotherms introduced by Humboldt in 1817.
Estimates had been made previously by Humboldt, De Lapparent, H.
Trend, forms the water-parting between the streams tributary to the Humboldt river in Nevada and those that flow into the Snake river through Idaho and Oregon and thence to the Pacific Ocean.
The mountains also increase in height and importance as far as the East Humboldt range, a lofty mass about 60 m.
On its eastern slope the waters soon disappear within the bed of narrow canyons, but break out again at the foot in icecold springs that form the source of the Ruby and Franklin lakes; on its western side the descent is more gentle, and the waters form the South Fork of the Humboldt river.
Toward the Humboldt, but seldom has sufficient volume to enable it to reach that stream.
Of the California boundary lies a third important range, the Humboldt Mountains, whose highest point (Star Peak) is 9925 ft.
From the valley of the Humboldt river southward the plateau gradually rises until the divide between this stream and the Colorado river, in the vicinity of the White Pine Mountains, is reached.
North of the Humboldt Valley an area of about 5000 sq.
Of the basin streams the Humboldt is the most important.
This stream empties into the Humboldt lake, the overflow from which goes into the so-called Carson Sink.
Several varieties of poplar are found in the upper canyons, and trees of the willow-leaved species in the Humboldt Mountains often attain a height of 60 ft.
In the central, north-eastern and north-western sections, embracing the counties of Nye, Elko and Humboldt, the average annual rainfall varies from 7 to 8 in.; in the west-central section, at the foot of the Sierra, the average is about 10 in.
At the head of the Humboldt river frosts are of almost nightly occurrence, and in the Carson Valley damaging frosts often occur in June.
The three principal areas in which irrigation is practicable are along the Humboldt river, in the plains watered by the Carson, Truckee and Walker rivers, and at the foot of the mountains along the western edge of the state.
The most productive part of the state is the Humboldt Valley and the region near Pyramid Lake, including the counties of Humboldt, Elko and VVashoe.
These first appeared in large numbers in the lower part of the Humboldt Valley in the summer of 1906, and in October and November 1907 it was estimated that they numbered on certain ranches from 8000 to 12,000 on every acre.
After unsuccessful attempts to rid themselves of the mice, the farmers appealed to the United States Biological Survey, and alfalfa hay poisoned with strychnia sulphate was used successfully in the Humboldt Valley in January 1908 and in the Carson Valley, where a similar plague threatened, in April 1908.5 Minerals.
A little graphite is produced in Humboldt county.
Considerable quantities of the following minerals have been found: barytes (heavy spar), magnetite (magnetic iron ore), and pyrolusite (manganese dioxide) in Humboldt county; roofing slate in Esmeralda county; cinnabar (ore containing quicksilver) in Washoe county; haematite in Elko and Churchill counties; cerussite and galena (lead ores) in Eureka county; and wolframite (a source of tungsten) at Round Mountain, White Pine county.
The oldest of these trunk lines, the Southern Pacific (formerly the Central Pacific), follows the course of the Humboldt and Truckee rivers.
Half a century later a party of trappers of the Hudson's Bay Company entered Nevada and plied their trade along the Humboldt river.
In 1806 he journeyed to Italy, and was for more than a year private tutor at Rome in the family of Wilhelm von Humboldt, who became his friend and correspondent.
As early as 1804, Humboldt expressed the opinion that petroleum was produced by distillation from deep-seated strata, and Karl Reichenbach in 1834, suggested that it was derived from the action of heat on the turpentine of pine-trees, whilst Brunet, in 1838, adumbrated a similar theory of origin on the ground of certain laboratory experiments.
This is due as much to the inspiriting teachings of Ritter and Humboldt as to the general culture and scientific training combined with technical skill commanded by the men who more especially devote themselves to this branch of geography, which elsewhere is too frequently allowed to fall into the hands of mere mechanics.
Huber, A percu statistique de file de Cuba (Paris, 1826); Humboldt; Sagra, vols.
The works (see above) of Sagra, Humboldt and Arango are indispensable; also those of Francisco Calcagno, Diccionario biogrdfico Cubano (ostensibly, New York, 1878); Vidal Morales y Morales, Iniciadores y primeros mdrtires de la revolucion Cubana (Havana, 1901); Jose Ahumada y Centurion, Memoria historica politica de.
In 1859, however, he entered the city disguised as a carter, and, through the influence of Humboldt with the king, got permission to stay there.
Von Humboldt (1769-1859).
Humboldt, Ehrenberg and Gustav Rose also paid in the course of these years short visits to Siberia, and gave a new impulse to the accumulation of scientific knowledge; while Ritter elaborated in his Asien (1832-1859) the foundations of a sound knowledge of the structure of Siberia.
Humboldt found it among the native tribes of the Orinoco valley, where it is called pirijao.
The latter is known as the llanos of the Orinoco, a region described by Humboldt as a vast " sea of grass," with islands of wood scattered here and there.
Since the time of Humboldt, however, the aspect of these plains would seem to have changed.
Von Humboldt and Aime Bonpland, Personal Narrative of Travel to the Equinoctial Regions of America (3 vols., London); M.
Von Humboldt, to that of Gay-Lussac, where in 1824 he concluded his investigations on the composition of the fulminates.
As a native of Hesse-Darmstadt he ought, according to the academical rules of the time, to have studied and graduated at the university of Giessen, and it was only through the influence of Humboldt that the authorities forgave him for straying to the foreign university of Erlangen.
Humboldt (Priifung der Untersuchungen ilber die Urbewohner Hispaniens vermittelst der waskischen Sprache, Berlin, 1821), ' For the prehistoric civilization of the peninsula as a whole see Spain.
The principal evidence which Humboldt adduced in its support was the possibility of explaining a vast number of the ancient topographical names of Spain, and of other asserted Iberian districts, by the forms and significations of Basque.
Von Humboldt, " Ober die cantabrische oder baskische Sprache " in Adelung, Mithridates iv.
Van Eys, for example, " La Langue iberienne et la langue basque," in Revue de linguistique, goes against Humboldt; but Prince Napoleon and to a considerable extent A.
The absence of rain here is ascribed to the action of the lofty uplands of the Andes on the trade-wind, and to the influence of the cold Humboldt current sweeping northward along the west coast of the continent.
The constantly prevailing wind on the Peruvian coast is from the south, which is a cold wind from the Humboldt current.
The lectures attracted hearers so eminent as Humboldt the cosmologist, Poinsot the geometer and Blainville the physiologist.