A Further Discussion of the Process of Faraday's Researches on Electromagnetic Rotation and Its Related Problems

In the light of Faraday's Diary,his works and his letters,this paper presents a careful investigation about the process of Faraday's researches on electromagnetic rotation and its related phenomena,and points out that the writing of Historical Sketch of Electro-magnetism had played a vital role in his discovery of the phenomenon of electromagnetic rotation,and that the discovery should be considered as consisting of a series of key experiments,and that any single experiment can be taken as its symbol.Furthermore,it discusses that the related researches and thought of Oersted,Ampere and Wollaston all had certain influence on Faraday's electromagnetism researches,but decisive factors of his discovery should owe to his observant ability,superb experimental skill and firm scientific spirit.In addition,also cited in the paper are instances of the misunderstanding on the part of predecessors as regards Faraday's electromagnetism researches.