. Political essay on the kingdom of New Spain [microform] : containing researches relative to the geography of Mexico, the extent of its surface and its political division into intendancies, the physical aspect of the country, the population, the state of agriculture and manufacturing and commercial industry, the canals projected between the South Sea and Atlantic Ocean, the crown revenues, the quantity of the precious metals which have flowed from Mexico into Europe and Asia, since the discovery of the new continent and the military defence of New Spain. Agriculture; Mines and mineral resourc
. Political essay on the kingdom of New Spain [microform] : containing researches relative to the geography of Mexico, the extent of its surface and its political division into intendancies, the physical aspect of the country, the population, the state of agriculture and manufacturing and commercial industry, the canals projected between the South Sea and Atlantic Ocean, the crown revenues, the quantity of the precious metals which have flowed from Mexico into Europe and Asia, since the discovery of the new continent and the military defence of New Spain. Agriculture; Mines and mineral resources; Agriculture; Mines et ressources minières. CHAP. XI.] KINGDOM OF NEW SPAIN. 219 the deepest point of the mine, which according tO'iny measurements* is only 324 metresf above the level of the lake of Zumpango; but the minerals which they extracted did not com- pensate the expence of the process, and the mine was again abandoned in 1801. It is surprizing that they never thought of substituting to this wretched plan of drawing off the water by bags, proper pump apparatus, put in motion by horse haritelsj by hydraulical wheels, or by machines moved by a column of water (colonne d'eau), A level begun at Pachuca, or lower down towards Gazave in the valley of Mexico, would have exhausted the mine of Bis- caina at the pit of San Ramon, for a depth of 370 metres J. The same object could be attained at less expence, by following the project of *El- huyar, in placing the mouth of a new level near Omitlan, in the road which leads from Moran, to the place of amalg-amation at Regla. ThidI * I found the ui>«*1utc height of the lake of Zumpango, 2284 metres (74-92 feet. Truus.,\ the pit of Ilaraon 2815 metres (9233 feet. Trans.); now the deepest point of the mine of Biscaina is 307 metres ',1006 feet. Trans.; below the upper mouth of the pit. I insert these esults here, because in the country it is generally believed, that the works of the Real del Monte, have already reached the .
Size: 1333px × 1874px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjectagriculture, booksubjectminesandmine
