As the plates of this publication were intended to illustrate the various objects to which they refer, they are little ornamented; but have in general the recommendation of simplicity and geometrical truth. In this part I have been particularly favoured with many original drawings, which are usually considered amongst the inaccessible arcana of ship-building. They are much more numerous, useful, and correct, than what has hitherto appeared in any work of the kind. In fine, I have endeavoured, to the best of my judgment, to retrench the superfluities, and supply the deficiences of former writers on the same subject, as well as to digest and methodise whatever appeared loose or inaccurate therein.

This undertaking was first suggested to me by my worthy and ingenious friend George Lewis Scott, Esq; who considered it as a work of extensive utility, Indeed, in a country whose principal sources of strength are derived from the superiority of her marine, it is evidently wanted. I have the pleasure also to know that Sir Edward Hawke, and several officers of respectable abilities in our navy, are of the same opinion. To this may be added, what the celebrated M. Du Hamel lately observed, in a letter to me, s. I mention this expressly, because some sea-officers have considered the work unnecessary. It is however submitted, with all possible deference, to superior judges; to men of science and letters, who know the difficulty of explaining the parts of a mechanical system, when the readers are unacquainted with the subject.

A
LIST of the SUBSCRIBERS.

His Royal Highness the Duke of Gloucester.

His Royal Highness the Duke of Cumberland.

Right Hon. Lords Commissioners of the Admiralty, as a Board.

TABLE OF CONTENTS

[PREFACE.]