Rev. William H. Van Allen, rector of the Church of the Advent, Boston, will conduct the third of the series of four St. Paul's Society conferences on the general subject of "The Church and the Sacraments" in the parlor of Phillips Brooks House this evening at 7.15 o'clock. Evening prayer at 7 o'clock in the St. Poul's Society Chapel will precede the address. The meeting will be open to all members of the University.