Outstanding English theoretical physicist, Nobel Prize laureate P. A. M. Dirac gave a course of lectures on quantum field theory at Yeshiva University (New York) in the academic year 1963-1964, which essentially represent a continuation of lectures on quantum mechanics delivered there and translated into Russian. In them, he proposed a new and completely original construction of quantum field theory, from the very foundations to such important physical applications as the anomalous magnetic moment of an electron and the Lamb shift of atomic levels...