chemistry education, emphasizing a shift from merely conveying scientific results to teaching the methods by which these results can be achieved. Fresenius introduces the key principles of quantitative analysis, outlining the need for accuracy in measurement and the importance of practical experience in chemical laboratory work. He also outlines the structure of the guide, which addresses various aspects of quantitative analysis, including operation procedures, reagents, and specific analyses for different classes of substances. Overall, the introduction sets the stage for a detailed exploration of quantitative chemical analysis, aimed at enhancing the reader’s understanding and capability in the field. (This is an automatically generated summary.)