Memoria sobre a cultura, e productos da cana de assucar

Metadata

Gutenberg ID

25148

Title

Memoria sobre a cultura, e productos da cana de assucar

Language

pt

Book source

Project Gutenberg

Description max 80 words

José Caetano Gomes presents a comprehensive treatise on sugarcane cultivation and sugar production in 18th-century Brazil. This technical manual critiques inefficient colonial methods, advocating for scientific agricultural principles, improved machinery, and better manufacturing processes to enhance economic prosperity.

Summary up to 500 words

In his 1799 memorandum, *Memoria sobre a cultura, e productos da cana de assucar*, José Caetano Gomes presents a comprehensive critique of the sugar industry in the Rio de Janeiro captaincy, addressing Prince Regent John VI with a proposal for scientific reform. Gomes argues that despite Brazil's ideal climate, free from natural disasters like earthquakes or plagues, the colony fails to reach its potential due to moral causes: ignorance, poor management, and a reliance on uneducated slave labor. He contrasts the colony's backward methods with the advanced agricultural practices of Europe and other colonies. Gomes begins by analyzing the sugarcane plant itself, noting that current cultivation practices are flawed. He criticizes the dense planting of canes without alignment, which robs plants of sunlight and nutrients, and the use of shallow holes that fail to support deep root systems. He proposes wider spacing, the use of plows and hoes to improve soil quality, and the application of manure to prevent the growth of 'taioba' (wild, watery cane). He draws parallels to viticulture in Portugal, explaining that just as shaded grapes produce sour wine, shaded sugarcane yields low-quality sugar. The core of the work focuses on the mechanics of sugar production. Gomes details the inefficiencies of existing equipment, such as wooden vats that promote fermentation and spoilage, and furnaces that apply excessive heat, decomposing sugar into molasses. He introduces a theoretical framework based on chemistry, explaining that sugar is a saline body formed from soluble earth, acid, and oily substances. Successful production, he argues, requires separating these components through precise heat control and the use of alkaline decoctions (ash and lime) to remove impurities. He provides specific instructions for constructing new copper vats and furnaces designed to regulate heat effectively. Furthermore, Gomes addresses the production of aguardente (cane spirit), emphasizing the necessity of stopping fermentation at the correct moment to preserve quality. He also advocates for technological upgrades in transportation, suggesting the adoption of carretas (wagons) over traditional carts to reduce animal fatigue on unpaved roads. Throughout the text, he stresses the importance of sunlight, air, and scientific principles over blind tradition. The work concludes with a commitment to accuracy, including a list of corrected typographical errors, reflecting the author's dedication to clarity and the advancement of the colony's economic prosperity.

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Categories

• Science
• Agriculture