Rev. C. L. Slattery '91, D.D., of Springfield will preach in Appleton Chapel tomorrow evening at 7.30 o'clock. Seats on the floor will be reserved until 7.25 o'clock for members of the University and friends accompanying them. The gallery will be open to the public at 7 o'clock. Dean Fenn of the Divinity School will conduct morning prayers next week and will have charge of the vesper service Thursday afternoon.