The artificial horizon consists of a threaded brass telescope with an erect image, which is to be shipped in a sextant telescope bracket. An extension arm is attached to the telescope. The forward end of the extension arm is forked, and supports a balanced lever with a pendulum that operates in an oil bath that is attached to the lower end of the extension arm. The fork at the forward end of the lever carries a crosswire that ensures that the sextant is held horizontally, and replaces the horizon. There is a provision for clamping the pendulum to facilitate adjustment. The artificial horizon is contained in a rectangular fitted mahogany box with a sliding lid.

James Baxter Murray patented this artificial horizon (no. 10,183 of 1893).