Between 1827 and 1860 at the Royal Institution in London, Faraday gave a series of nineteen Christmas lectures for young people, a series which continues today. The objective of the lectures was to present science to the general public in the hopes of inspiring them and generating revenue for the Royal Institution. They were notable events on the social calendar among London's gentry. Over the course of several letters to his close friend Benjamin Abbott, Faraday outlined his recommendations on the art of lecturing, writing "a flame should be lighted at the commencement and kept alive with unremitting splendour to the end".[76] His lectures were joyful and juvenile, he delighted in filling soap bubbles with various gasses (in order to determine whether or not they are magnetic), but the lectures were also deeply philosophical. In his lectures he urged his audiences to consider the mechanics of his experiments: "you know very well that ice floats upon water ... Why does the ice float? Think of that, and philosophise".[77] The subjects in his lectures consisted of Chemistry and Electricity, and included: 1841: The Rudiments of Chemistry, 1843: First Principles of Electricity, 1848: The Chemical History of a Candle, 1851: Attractive Forces, 1853: Voltaic Electricity, 1854: The Chemistry of Combustion, 1855: The Distinctive Properties of the Common Metals, 1857: Static Electricity, 1858: The Metallic Properties, 1859: The Various Forces of Matter and their Relations to Each Other.[78]
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