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Memoria sobre a cultura, e productos da cana de assucar

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Published: 1800
Language: Portugues
Wordcount: 28,367 / 92 pg
LoC Category: PT
Downloads: 304
Added to site: 2008.04.24
mnybks.net#: 20654
Genre: Essays
Excerpt

lde;o. As plantas são viventes, que tem a faculdade de se reproduzir pela semente, pelo tronco, e pela raiz. A experiencia de Boyle, milhares de vezes repetida, e sempre confirmada, prova com evidencia, que tirão a maior parte da sua nutrição do ár; ellas tem vasos absorventes para receberem o alimento, e vasos exhalantes para se alliviarem do superfluo; ainda que estes orgãos se não percebão á simples vista, a existencia delles he huma verdade. Assim como os animaes dão pasto a differentes especies de insectos, tambem os vegetaes sustentão huma innumeridade delles; cada hum tem os seus. Huma folha que cahe de qualquer planta, causa a morte a milhares de entes invisiveis. O fogo, o ár, a agua, o humus, e a terra concorrem para a vegetação. O fogo he o motor, o ár o agente, a agua o vehiculo, o humus o que faz a seiba.

O fogo como calor, e como luz, faz subir os fluidos nas plantas desde a raiz; a fr

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