The four articles in this issue ofAmbixwere among seven papers presented in a symposium at the fall 2016 national meeting of the American Chemical Society on the occasion of the 2016 History of Chemistry Division’s Award to Ursula Klein for Outstanding Lifetime Achievement in the History of Chemistry. Klein’s symposium keynote paper appeared in 2017 in the Division’s Bulletin for the History of Chemistry. The four articles that follow in this issue cohere around major themes in Klein’s work, most notably the role in chemical investigation and documentation of paper tools such as classifications, formulas, models, diagrams, and other images. In her book, Experiments, Models, Paper Tools, Klein has this to say about paper tools:

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1780 年代至 1960 年代的纸制工具：命名、分类和表示法

本期 Ambix 中的四篇文章是在 2016 年美国化学学会秋季全国会议上的 2016 年化学史部向 Ursula Klein 授予化学史杰出终身成就奖之际的研讨会上发表的七篇论文之一。Klein 的专题讨论会主题论文于 2017 年发表在该部门的化学史公报上。本期接下来的四篇文章围绕 Klein 工作的主要主题，最显着的是化学调查和纸质工具（如分类、公式、模型、图表和其他图像）记录的作用。在她的《实验、模型、纸工具》一书中，克莱因这样说到纸工具：