Identity of Lightning and Electricity--Franklin’s Experiment--Fatal Experiment of Richman--Immediate Cause of Lightning--Illustration from Electric Spark--What a Flash of Lightning Is--Duration of a Flash of Lightning--Experiments of Professor Rood--Wheatstone’s Experiments--Experiment with Rotating Disc--Brightness of a Flash of Lightning--Various Forms of Lightning--Forked Lightning, Sheet Lightning, Globe Lightning--St. Elmo’s Fire--Experimental Illustration--Origin of Lightning--Length of a Flash of Lightning--Physical Cause of Thunder--Rolling of Thunder--Succession of Peals--Variation of Intensity--Distance of a Flash of Lightning Destructive Effects of Lightning--Destruction of Build…
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