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that I am convinced it is now perfect, and will pro. duce all the benefits that can be expected from a free circulation of fresh air in clofe places ; without any of thole imaginary inconveniencies, that by fome few were apprehended from it. And my conviction does not arise from the truth of the principles alone, on which it is founded; but likewise from impartial experiments made with my machine during long voyages in several parts of the world; and ample testimonials of its falutary effees, wherewith I have been honoured ; the most material of which you will find at the foot of this letter. I have now the satisfaction to inform


that invention has at length surmounted all obstacles through the wisdom and zeal of the present Right Honourable the Lords of the Admiralty, and the Right Honourable and Honourable the principal officers and commissioners of his Majesty's navy, who, having taken the whole affair into their serious consideration, were fo thoroughly satisfied of the great advantages that must accrue to the nation from the faithful execution of my scheme; that the said principal officers and commissioners of his Majesty's navy have contracted with me for fixing my engine on board his Majesty's ships, whether laid up, or in commission : for which act of general concern, as I well know the warmth of your heart for the good of our country, I doubt not but you will readily concur with me in making cordial acknowledgments to their Lordships, and those Hopourable gentlemen in the name of the public.

Yous, &c.


Extract from Lord Anson's voyage, 4to

edit. p. 36. fhewing the want of an engine to extract the foul air.

HE Captains of the squadron represented to the

Commodore, that their ships companies were very sickly, and that it was their opinion, as well as their surgeons, that it would tend to the preservation of the men to let in more air between decks; but that their ships were so deep, they could not possibly open their lower ports. On this representation, the Commodore ordered fix air-fcuttles to be cut in each ship, in such places where they would least weaken it.

And on this occasion I cannot but obferve, how much it is the duty of all those, who, either by office or authority, have any influence in the direction of our naval affairs, to attend to this important article, the preservation of the lives and health of our feamen. If it could be supposed, that the motives of humanity were infufficient for this purpofe ; yet policy, and a regard to the success of our arms, and the interest and honour of each particular commander, should naturally lead us to a careful and impartial examination of every probable method proposed for keeping a ship's crew in health and vigour. But hath this been always done? Have the late invented plain and obvious methods of keeping our ships fweet and clean, by a constant supply of fresh air, been considered with that candour and temper which the great benefits promised thereby ought naturally to have inspired? On the contrary, have not those falutary schemes been often treated with neglect and contempt? And have not Hh 2


fome of those who have been intrusted with experimenting their effects, been guilty of the most indefensible partiality, in the accounts they have given of these trials? Indeed, it must be confessed, that many distinguished persons, both in the direction and command of our ts, have exerted themselves on these occasions with a judicious and dispassionate examination, becoming the interesting nature of the inquiry; but the wonder is, that any could be found irrational enough to act a contrary part, in despite of the strongest dictates of prudence and humanity. I must however own, that I do not believe this conduct to have arises from motives fo favage, as the first reflection thereon docs naturally suggest : but I rather inpute it to an obftinate, and in some degree fuperftitious, attachment to fuch practices as have been long established, and to a fettled contempt and hatred of all kinds of innovations, especially such as are projected by landmen, and perfons refiding on fhore.

Testimonials of the advantages and success of

my machines for purifying the air in ships, and other close places.

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Extract of a letter from Rear-Admiral Bofcawen to

Mr Corbett, dated in Table-bay, 9th April 1748. THE fquadron, as well as the troops

, who are with me, are surprisingly healthy, and have been fo in general our whole passage : which I attribute in a great measure to our having touched at the illands, where I procured refreshment.-- But at the fame time I cannot help thinking, the air-pipes fixed in the men of war have been of great service in this particular, by purifying the air between decks, and thereby preventing the scurvy.


In addition to what I have faid above of the airpipes, I cannot help observing to their Lordships, that the bulge-water on board the Namur in particular, has not been the least offensive the whole passage ; though it was so bad when we last went into Portsmouth harbour, that three or four men were like to be fuffocated, by only coming near the well; and therefore I cannot but recommend them as things highly useful on board his Majesty's ships.

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R Joseph Hatton, carpenter of the Warwick

man of war, during her voyage to Guinea, and the West Indies, mentioned above, p. 211. declared at the navy-board, that on the accident of breaking the chain of their pump, it tell with a kink in the chain, so that it could not be got up or down ; wherefore he was obliged to go into the well, in order to cut a scuttle in the pump to clear the kink: that he remained in the well near five hours in a considerable depth of water, without any ill effect on his health ; which he imputes to the pipes being fixed on board the said ship, for extracting the foul air.

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CAptain Petre, commander of the Sandwich, in

the service of the East-India company, on board of which ship Mr Sutton had constructed one of his

machines, machines, declared at the navy-board, that on his return from a China voyage in 1747, when he put in at Ireland, he ordered some of the bulge-water to be brought up; and it differed not in smell from other common fea-water, but differed in colour as the liquor of bohea from green tea.

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Extra£t of a letter from Captain William Lisle, com

mander of his Majesty's ship the Vigilant, at the Cape of Good Hope, April 10. 1748.


Gave you an account of all that occurred till I left

Madeira, in a letter from thence: however, that you may form a better idea of the tedious passage to this place, I shall just mention the dates of our departure from the several ports we touched at in our passage. We left Spithead the second of November, Lilbon the twenty-fourth of January, and arrived at the Cape of Good Hope the twenty-second of March; by which you may observe, that our passage from Madeira to this place was just eleven weeks, and our whole voyage from England full five months, if we fix each month at twenty-eight days : which is a long time to be getting but little more than half-way to our journey's end ; but though long, yet it has been attended with very few bad circumstances : and partiçularly in regard to the health of the several ships companies, and all the troops in general, never were people more healthy ; which I cannot but suppose is entirely owing to the new-invented ventilators *, and * N. B. These are Mr Sutton's air-pipes.


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