The author claimed that he had conducted a series of experiments on guide blade propellers some 20 years before J I Thornycroft, and that the results of these had been published in the Times, 30 August 1865; in 'Papers on Naval Architecture,' No. XIV. Vol. Iv. 1865; 'Proceedings,' Inst. Naval Architects, 1867 and 1868 and 'Proceedings' Society of Engineers, 1868.