EXHIBITION AND DESCRIPTION OF ONE OF A SET OF INDICATORS FOR STEAM-ENGINES, MADE BY MR. PENN OF GREENWICH FOR THE FRENCH GOVERNMENT, TO BE USED IN TRYING EXPERIMENTS ON THE STEAM VESSELS IN THEIR NAVY.
FAREY (1842), "EXHIBITION AND DESCRIPTION OF ONE OF A SET OF INDICATORS FOR STEAM-ENGINES, MADE BY MR. PENN OF GREENWICH FOR THE FRENCH GOVERNMENT, TO BE USED IN TRYING EXPERIMENTS ON THE STEAM VESSELS IN THEIR NAVY.". Minutes of the Proceedings of the Institution of Civil Engineers, Vol. 2 No. 1842 pp. 135, doi: https://doi.org/10.1680/imotp.1842.24691
