This article focuses on the developments in electromagnetism during early 19th century. The discovery of by Hans Christian Orsted, 1820, was a gamechanging event that opened perspectives into deep understanding physics and fundamental technical applications. In this article, principles to measure quantify electric current are given particular attention. Several scientists, including Schweigger,...

Long after Gustave Eiffel’s famous tower had been built to celebrate the first century of Republic, many Parisians were still offended by this tour de fer and sought its removal. Eiffel argued against this, saying that unique advantages tower’s elevation offered for scientific research justifie...