The AUTHOR, introducing the paper, apologised for inflicting on a long-suffering profession yet another method of dealing with prestressed concrete, but explained that he had been horrified at the tendency to overwhelm the subject with formulae and notations, to say nothing of fundamentally unsound assumptions, such as that of using the standard moment of inertia for a beam for calculations outside the non-linear stress strain range. As his job was to teach students, with whom he had already taken some pains to train to think for themselves, he just dared not try to teach them the
current unsound theories, and evolved the present technique as a theoretically sounder method.