 | American Medical Association - 1870 - 16 páginas
...that 25,000 cinchona trees were destroyed every year, and Euiz protested against the custom of barking the trees, and leaving them to be destroyed by rot. But nothing was done in the way of conservancy, either by the government or by private speculators whose subsistence... | |
 | American Medical Association - 1870 - 706 páginas
...that 25,000 cinchona trees were destroyed every year, and Ruiz protested against the custom of barking the trees, and leaving them to be destroyed by rot. But nothing was done in the way of conservancy, either by the government or by private speculators whose subsistence... | |
 | Sir Clements Robert Markham - 1880 - 588 páginas
...25,000 chinchona-trees were destroyed every year, and Ruiz § protested against the custom of barking the trees, and leaving them to be destroyed by rot....Bolivia, rich as they are, cannot long resist the continual attacks to which they have been recently exposed. He who, in Europe, sees these enormous... | |
 | Sir Clements Robert Markham - 1880 - 592 páginas
...25,000 chinchona-trees were destroyed every year, and Ihiiz § protested against the custom of barking the trees, and leaving them to be destroyed by rot....But nothing was ever done in the way of conservancy, cither by the Government, or by private speculators whose subsistence depended on a continued supply... | |
 | Ignacio Gutiérrez Ponce - 1900 - 566 páginas
...that 25.000 cinchona trees were destroyed every year. and Ruiz protested against the custom of barking the trees and leaving them to be destroyed by rot....way of conservancy, either by the Government, or by prívate speculators whose subsistence depended on a cultivated supply of bark." (Peruvian Bark. A... | |
 | Ignacio Gutiérrez Ponce - 1900 - 560 páginas
...destroyed every year. and Ruiz protested against the custom of barking the trees and leaving tl1em to be destroyed by rot. But nothing was ever done...way of conservancy. either by the Government, or by prívate speculators whose subsistence depended on a cultivated supply of bark." (Peruvian Bark. A... | |
 | American Medical Association - 1870 - 704 páginas
...that 25,000 cinchona trees were destroyed every year, and Ruiz protested against the custom of barking the trees, and leaving them to be destroyed by rot. But nothing was done in the way of conservancy, either by the government or by private speculators whose subsistence... | |
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Humboldt reported that 25,000 chinchona-trees were destroyed every year, and Ruiz § protested against the custom of barking the trees, and leaving them to be destroyed by rot. But nothing was ever done in the way of conservancy, either by the Government,... 