. . "The valve trombone continued to enjoy an extended period of popularity in Italy and Bohemia and composers such as Giuseppe Verdi, Giacomo Puccini, Bed??ich Smetana and Anton??n Dvo????k scored for a section of valve trombones.Especially with the ophicleide or later the tuba subjoined to the trombone trio during the 19th century, parts scored for the bass trombone rarely descended as low as the par" . . . . .