Dr. ingenuous t m the Salubrity , See. 355 
Hated by their breathing in it: fo that the falutary gales, 
by which this infected air is conveyed to the waters, 
and by them returned again to the land, though they do 
rife now and then to ftorms and hurricanes, muft never- 
thelefs induce us to trace and to revere in them the ways 
of a beneficent Being, who, not fortuitoufly, but with 
dcfign, not in wrath, but in mercy, thus fhakes the wa- 
ters and the air together, to bury in the deep thofe pefti- 
lential effluvia which the vegetables upon the face of 
the earth are infufficient to confume. 
I was not without hope, that fuch experiments might 
tend to throw a new light .upon the caufe of that almoft 
univerfal effedt of the fea air, to wit, its increafing the 
powers of life, and giving a keener appetite by h alien- 
ing the digeftion of food. 
I fhall now give you an account of the experiments I 
made in confequence of your fuggeftion, in the fame 
order as they were made; and beg you to •prefej.it them 
to the Royal Society, if you think them worthy the at- 
tention of that learned body. 
I muft firft, however, premife, that as I wrote this 
paper in noify inns, on fhip-board, and places little 
adapted to philofophical application, I hope you will 
■i. 
make fome allowance for the inaccuracies which you .may 
Vol. LXX. Bbb find 
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