Treatise on stay-sails for the purpose of intercepting wind between the square-sails of ships and other square-rigged vessels;
mathematically demonstrating the defects of those now in use, and the eminent superiority of the improved patent stay-sails,
recently invented by Captain Sir Henry Heathcote, R.N. Illustrated by suitable diagrams and two plates of ships ... To which are added some remarks on proportioning the jibs, & c. ...

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