It was to the unusual Sobriety of my Crew, that I ascribed, in some measure, their uncommon Healthiness; for Sailors breathe a purer Air, and enjoy more Exercise and Liberty, than Passengers or Slaves; wherefore their Ailments are owing to bad or disorderly Living, as well as to unwholsome Air. “Could I but see the immoderate Use of spirituous Liquors less general, and the Benefits of Ventilators more known and experienced, I might then hope to see Mankind better and happier. I am, “SIR, “_Your most obediens Servant_, HENRY ELLIS.” Bristol, Dec. 26, 1753. 49. And, by the like good Conduct, in his next Voyage in the Year 1755, not one of 312 Slaves died; and all his 36 Sailors arrived alive and well at _Bristol_. 50. And the Earl of _Halifax_ has often informed me of the great Benefit they found by the Use of Ventilators, in several _Nova Scotia_ Transport-Ships, twelve to one more have been found to die in unventilated than in ventilated Ships. It is indeed a self-evident Thing, that the changing the foul Air frequently in Ships, in which there are many Persons, will be a means of keeping them in better Health than not doing it; which makes it the more astonishing that effectual Proposals to remedy so great an Evil, should be received with so much Coldness and Indifference by Mankind. They little consider that it is the high Degree of Putrefaction (that most subtile Dissolvent in Nature) which a foul Air acquires in long stagnating, which gives it that pestilential Quality, which causes what is called the Goal-Distemper. And a very small Quantity, or even Vapour of this highly attenuated Venom, like the Infection or Inoculation for the Small-pox, soon spreads its deadly Infection. Ought not Men therefore, from the common natural Principle of Self-Preservation, to use their utmost Endeavours to shun this pestilent Destroyer, by which Millions of Mankind have perished in Ships? _An Account of some Tryals to cure the ill Taste of_ Milk, _which is occasioned by the Food of_ Cows, _either from Turnips, Cabbages, or autumnal Leaves_, &c. _Also to sweeten_ Stinking-water, &c. 51. This Method of blowing Showers of Air up thro’ Liquors, will be of considerable Use in several other Respects, as well as in Distillation, as appears by the following Trials, _viz._