A model for a Canal Lock of a very ingenious and curious construction, has lately been presented to the Company of Undertakers of the Grand Canal, by an artist in this city [Dublin], having among some other improvements on the old locks the following remarkable ones:
- That of raising or falling a boat from a level of sixty feet by a single lock.
- That of obviating, by a single contrivance, the waste of water, so that at the passage of any boat through it, more than nine-tenths of the water will be retained for the next occasion: this lock will therefore not require a sixth part of the water now expended in the smallest lock on the navigation.
The model is now in complete order at the Navigation House, and was particularly intended by the inventor to answer the great fall from the level of the Canal at James’s-street to the river Liffey; an object not yet fully determined upon by the Company, which Company has, however, as a token of its approbation of so very ingenious a contrivance, presented the inventor with twenty guineas, and should his plan be ever executed by them, there is no doubt but he will be rewarded according to his merit.
12 September 1787