H. Guy
- Description of Mr Henry Guy's Method of Giving a true Spherical Figure to Balls of Metal, Glass, Agate or Other Hard Substances. In: Transactions of the Institution of Civil Engineers, v. 2, n. 1 (January 1838). (1838):
- Description of Mr. Henry Guy's Method of Giving a True Spherical Figure to Balls of Metal, Glass, Agate, or other Hard Substances. In: Minutes of the Proceedings of the Institution of Civil Engineers, v. 1, n. 1837 ( 1841). (1841):