Abstract
Four new kinds of experiments on angular correlation in 3-, 5-(β 1st) or 6+(β 2nd) 4+(े1 2) 2+(े2 2)0+ are proposed so as to determine definitely ST (or VT) as the β-decay interaction. Some other decay schemes also useful for this purpose are discussed. Various angular correlation functions are given for the successive triple transitions of ॅ, β, े rays and also of the other kind of particles.