The fourth Vesper service of the year will be held in Appleton Chapel at 5 o'clock this afternoon. Rev. Professor Henry B. Washburn of Cambridge will conduct the service, and the following musical program will be rendered: "The heavens proclaim Him," Beethoven; "I will lay me down," Brown; Aria from "Daughter of Jairus," Stainer. The soloist will be William W. Hicks. The front seats are reserved for students and for officers of the University and their families until 4.55 o'clock.