LOS FRAILES OR THE ORGANS OF ACTOPAN BY ALEXANDER VON HUMBOLDT

ALEXANDER VON HUMBOLDT (1769-1859)
WILHELM FRIEDRICH ( 1760-1820), engraver
The Organs of Actopan or Los Frailes (1,140 m - 3,740 ft)
Mexico (Hidalgo)

In Vues des Cordillères, et monumens des peuples indigènes de l'Amérique from the book  Voyage aux régions équinoxiales du nouveau continent, 1813

About this engraving and the mountain
On May 23 and 24, Humboldt would tour the Actopan Valley, and then leave on May 25 for Mexico City. During the visit, Humboldt drew and studied the Organs of Actopan, also known as Los Frailes,located 17 km southeast of Actopan in the municipality of El Arenal. Humboldt determines their height trigonometrically.In Actopan. The slender part of the rock is a hundred meters high; but the absolute elevation of the summit of the mountain, where the Organos begin to stand out, is 585 toises (1,140 m - 3,740 ft) .  It is on the way from Mexico to the mines of Guanaxuatotjuon distinguishes from very far away, and standing out on Thoiizon, the rock of Mamanchota: it rises in the middle of a forest of oaks, and oflers a very picturesque aspect. 

The artist and explorer
Friedrich Wilhelm Heinrich Alexander von Humboldt was a Prussian geographer, naturalist, explorer, and influential proponent of Romantic philosophy and science. He was the younger brother of the Prussian minister, philosopher, and linguist Wilhelm von Humboldt (1767–1835). Humboldt's quantitative work on botanical geography laid the foundation for the field of biogeography. Humboldt's advocacy of long-term systematic geophysical measurement laid the foundation for modern geomagnetic and meteorological monitoring.
Between 1799 and 1804, Humboldt travelled extensively in Latin America, exploring and describing it for the first time from a modern scientific point of view. His description of the journey was written up and published in an enormous set of volumes over 21 years. Humboldt was one of the first people to propose that the lands bordering the Atlantic Ocean were once joined (South America and Africa in particular). Humboldt resurrected the use of the word cosmos from the ancient Greek and assigned it to his multi-volume treatise, Kosmos, in which he sought to unify diverse branches of scientific knowledge and culture. This important work also motivated a holistic perception of the universe as one interacting entity.
On their way back to Europe from Mexico on their way to the United States, Humboldt and his fellow scientist Aimé Bonpland stopped in Cuba for a while. After their first stay in Cuba of three months they returned the mainland at Cartagena de Indias (now in Colombia), a major center of trade in northern South America. Ascending the swollen stream of the Magdalena River to Honda and arrived in Bogotá on July 6, 1801 where they met Spanish botanist José Celestino Mutis, the head of the Royal Botanical Expedition to New Granada, staying there until September 8, 1801. Mutis was generous with his time and gave Humboldt access to the huge pictorial record he had compiled since 1783. Humboldt had hopes of connecting with the French sailing expedition of Baudin, now finally underway, so Bonpland and Humboldt hurried to Ecuador. They crossed the frozen ridges of the Cordillera Real, they reached Quito on 6 January 1802, after a tedious and difficult journey.
Their stay in Ecuador was marked by the ascent of Pichincha and their climb of Chimborazo, where Humboldt and his party reached an altitude of 19,286 feet (5,878 m). This was a world record at the time, but a thousand feet short of the summit. Humboldt's journey concluded with an expedition to the sources of the Amazon en route for Lima, Peru.
At Callao, the main port for Peru, Humboldt observed the transit of Mercury. On 9 November and studied the fertilizing properties of guano, rich in nitrogen, the subsequent introduction of which into Europe was due mainly to his writings.
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2022 - Wandering Vertexes...
by Francis Rousseau