Abstract :
IT IS THE OBJECT of this paper to exhibit the great range of problems, often very difficult analytically, which can be solved with comparative ease by graphical means. The paper is based on several lectures presented to the electrical and mechanical sections of the advanced course in engineering of the General Electric Company. Due to lack of space the theory will be presented rather briefly, though enough of it will be included to make the treatment complete. Some of the solutions presented are believed to be new.
