Historical table comparing steam engine coal consumption and cost 插畫檔

A historical illustration presents a detailed table comparing the coal consumption and cost per horsepower of various steam engine types, including simple, compound, and triple-expansion machines, with specific cost ranges for machines exceeding 100 horsepower. The table is presented in Italian, with numerical data indicating efficiency and economic performance. The accompanying text explains that the figures represent optimal operating conditions, emphasizing the minimal coal consumption for each engine type. The illustration is a technical document focused on industrial machinery economics, likely from the late 19th century, and is presented on aged paper with visible text and numerical data. Historical illustration reproduced from a publication from Italy.