The first temple baptismal font is dedicated. The first ordinance is a baptism for the dead, with Young as officiator and Reuben McBride as proxy. The second ordinance is a baptism for health which heals Samuel Rolfe within the week. Four temples would eventually perform 22,403 baptisms for health from 1877 through 1893.
[Source: Quinn, D. Michael, The Mormon Hierarchy: Origins of Power, Appendix 7: Selected Chronology of the Church of Jesus Christ of Latter-day Saints, 1830-47, http://amzn.to/origins-power]