This article focuses on the developments in electromagnetism during the early 19th century. The discovery of electromagnetism by Hans Christian Ørsted, in 1820, was a gamechanging event that opened perspectives into the deep understanding of physics and fundamental technical applications. In this article, the principles to measure and quantify electric current are given particular attention. Several scientists, including Schweigger, Poggendorff, Nobili, and Pouillet, contributed to the development of an instrument toward this purpose, the galvanometer. Here, we put special emphasis on research by Johan Jacob Nervander, whose tangentbussol, presented to l'Institut de France, in spring 1834, and later published in Annales de Chimie et de Physique, was a significant milestone in the instrumentation of electrical engineering.

中文翻译：

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约翰·雅各布·内尔文德（Johan Jacob Nervander）和电流量化[从历史上讲]

本文重点介绍19世纪初期电磁学的发展。汉斯·克里斯蒂安·厄斯特（Hans ChristianØrsted）在1820年发现了电磁学，这是一个具有革命性意义的事件，它为深入了解物理和基本技术应用打开了视野。在本文中，要特别注意测量和量化电流的原理。包括Schweigger，Poggendorff，Nobili和Pouillet在内的几位科学家为实现这一目的开发了振镜仪器。在这里，我们特别强调Johan Jacob Nervander的研究，他的切线粉于1834年春天提交给法兰西学院，并于随后发表于物理化学年鉴，是电气工程仪表的重要里程碑。