As a boy he had acquired great skill in the construction of model boats and took special interest in their means of propulsion. This fascination with boats remained with him and in 1834 on a reservoir near his farm, he perfected the propulsion of a model boat by means of a wooden screw driven by a spring. He became utterly convinced that this form of propulsion was greatly superior to the paddle wheel which was in use at the time. The following year he built a superior model with which he performed a number of experiments at Hendon and in 1836 took out a patent for propelling vessels by means of a screw revolving beneath the water at the stern.