We tabulate percentage points of the beta distributionzIIsuch thatFβ(zII|r,n) = II. The percentage points are given to four decimal places for II = .01, .05(.05).95, .99,n= 2(1)30, 40, 50 andt= 1(1)[n/2]. The tables are primarily for use in Bayesian analysis of Bernoulli processes as treated in Raiffa and Schlaifer [7]. Numerical integration of a function with respect to the beta distribution is also discussed. An example is given.