You are probably thinking of Joseph F. Smith's editorial in the Improement Era when he was President of the Church: A wife does not hold the priesthood in connection with her husband, but she enjoys the benefits thereof with him; and if she is requested to lay hands on the sick with him, or with any other officer holding the Melchizedek priesthood, she may do so with perfect propriety. It is no uncommon thing for a man and wife unitedly to administer to their children, and the husband being mouth, he may properly say out of courtesy, "By authority of the holy priesthood in us vested.” (Joseph F. Smith Improvement Era, 1907, vol. 10 pg. 308) There are random occurences of women invoking their husband's priesthood, but there are thousands and thousands of references where they do it simplyin the name of Jesus. RE: the healing of the oxen. Again, it wasn't Eliza Snow, it was Mary Fielding's oxen. And she didn't do it. She had some men in the wagon company do it.