He was the author of many texts including A methodical synopsis of the Mineral Waters of Ireland (1757) and An Essay towards the Natural History of the County of Dublin (1772).
After his death his spiritual diary was published, and the botanist William Henry Harvey named the genus Acanthaceae Ruttya after him.
Rutty was one of 49 physicians and chirurgeons who declared their public support for the construction of a Publick Bath in Dublin in May 1771 and named Achmet Borumborad as a well qualified individual for carrying such a scheme into existence.
The chief ill-doings of which he accuses himself are too great a love for the studies of the materia medica and meteorology, irritability, and excessive enjoyment of food.
He published in Dublin, in 1751, A History of the Rise and Progress of the People called Quakers in Ireland, from 1653 to 1751, a continuation of a book originally written by Thomas Wight of Cork in 1700; a fourth edition was issued in 1811.