HEDDA VAN DEN BEEMT, 1913: Philadelphia, Manuscript Music Society Concert, April 2, conducted his own “Introduction and Scene” for orchestra, “Aucassin et Nicolette”; Philadelphia, April 3-4, 1914, conducted same composition. WILLEM VAN HOOGSTRATEN, 1925: Philadelphia, January 16-17-19; Washington, January 20; Baltimore, January 21, conducted entire programme. LOUIS VON GAERTNER, 1910: Philadelphia, December 22-23, conducted his own Tone Poem, “Macbeth.” FELIX WEINGARTNER, 1905: Philadelphia, February 16, conducted entire programme—special concert. CAMILLE ZECKWER, 1916: Philadelphia, February 4-5, conducted his own “Sohrab and Rustum.” ORGANIZATIONS WHICH HAVE APPEARED WITH THE PHILADELPHIA ORCHESTRA BACH CHOIR OF BALTIMORE (1907), Baltimore. EURYDICE CHORUS OF PHILADELPHIA (1908, 1912). FORTNIGHTLY CLUB OF PHILADELPHIA (1908, 1916). BEN GREET PLAYERS (1909). JUNGER MAENNERCHOR SINGING SOCIETY OF PHILADELPHIA (1914). MENDELSSOHN CHOIR OF TORONTO (1914), Philadelphia. MENDELSSOHN CLUB OF PHILADELPHIA (1903, 1904, 1907, 1911, 1913, 1914, 1916, 1919). PHILADELPHIA ORCHESTRA CHORUS (1916, 1917, 1919, 1920, 1921). PITTSBURGH CHORUS, trained by Charles Heinroth (1921), Pittsburgh. SCHOLA CANTORUM OF NEW YORK (1919), New York. Organizations participating in the Lobgesang Symphony: CANTAVES CHORUS, EURYDICE CHORUS, FELLOWSHIP CLUB, FORTNIGHTLY CLUB, GERMANTOWN CHORAL SOCIETY, HAYDN CLUB, JUNGER MAENNERCHOR, LYRIC CLUB, MATINEE MUSICAL CLUB, MENDELSSOHN CLUB, ORPHEUS CLUB, PHILADELPHIA CHORAL SOCIETY, STRAWBRIDGE AND CLOTHIER CHORAL SOCIETY, TREBLE CLEF CLUB, VOCAL ART SOCIETY, WANAMAKER CHORAL SOCIETY. Outside organizations participating in the performance of Bach’s “St. Matthew Passion”: GIRLS’ NORMAL SCHOOL and GIRLS’ HIGH SCHOOL CHORUSES. SOLOISTS WHO HAVE APPEARED WITH THE PHILADELPHIA ORCHESTRA 1900-1925