The Brown University Orchestra will perform a pair of final concerts for the academic year under the direction of Paul Phillips. The program includes Vaughan Williams' "Concerto for Bass Tuba and Orchestra;" Sergei Prokofiev's "Piano Concerto No. 3, Op. 26;" and Igor Stravinsky's "Petrouchka," the 1911 composition. Tickets will be available on the Department of Music's website. The performance will be given on Friday and Sunday at 8 p.m. and 2 p.m, respectively. All events will be held in Sayles Hall, the College Green.