Orville Knapp and his original Waldorf Astoria orchestra will play at the Senior Spread in Lowell House Monday evening, it was announced yesterday.

Mr. Knapp, according to recent reports, boasts two pianos, an electric organ, and an electric guiter.

At the same time, Class Day officials have released the program of the concert for their Spread in the House Triangle next Thursday night. In case of rain the following list of festivities will be moved into the Indoor Athletic Building: 1.  Harvard Glee Club Egbnert W. Fisher '36, Accompanist Irving G. Fine '37, Accompanist Tutti Venite Armati  Castoldi Glorious Apollo  Webbe O Du Eselhafter Martin (Canon)  Mozart Then Round About the Starry Throne  Handel 2.  Songs  Miguel Sereque, Jr. The Victor  Sanderson The Abbot of Derry  Weaver 3.  The Pierian Sodality of 1808 Harvard University Orchestra Malcom H. Holmes. Conducter Valse Triste  Sibelius Spanish Dance from "La Vida Breve"  De Falla 4.  Harvard Glee Club Praestat Hoc Nobles  Chadwick O Die Frauen  Brahms Der Gang Zum Liebchen  Brahms Choruses from Patience  Sullivan Fair Harvard The audience is expected to join in as usual with the singing of Fair Harvard.