( ^og ) 
very obnoxious to D^mps, great Humidity in the Air^ 
and more frequent Rains, than others that are more open 
zrA free. The great Moijiure in the Air^ was a mighty 
inconvenience and annoyance to thofe who firft fettled in 
America', which at that time was much over-grown 
with Woods and Groves. But as thefe w^ere burnt and 
Jiroyed^ to make way for Habitation and Culture 
of the Earth, the ^/r mended and cleared up apace : 
changing into a Temper much more ^/ry ^nd ferene than 
before. 
Nor does this Humidity go off and alone ; bat 
ufualiy bears forth with it many parts of ih^fafne Na- 
ture with thofe whereof the Plant, through which it paf- 
fes, confitls. The CraJJer indeed are not fo eaiily borne 
up ipto the Atmofphere : but are ufualiy depofited on the 
Surface oiiht Flowers, Leaves, and other Parts of the Plants. 
Hence comie our Manna's, our Honies, and other Gummous 
Exfudations of Vegetables, But the finer and lighter 
Parts are with greater eafe fent up inio the Atmofphere, 
Thence they are conveyed to our Organs of Smell, by 
the Air we draw in Refpiration : and are pleafant or of- 
fenfive, beneficent or injurious to us, according to the 
Nature of the Plants from whence they arife. And 
fince thefe owe their Rife to the Water that afcends out 
of the Earth through the Bodies of Plants, we cannot be 
far to feek for the Caufe why they are more numerous in 
the Air, and we find a greater quantity of Odours exha- 
ling from Vegetables, in warm, humid feafons, than in 
any others whatever. 
3. A great part of the terrefirial Matter that ismixt 
with the Water, afcends up into the Plant as well as the 
Water, There was much more terreftrial Matter at 
the end of the Experiment, in the Water of the Glafles 
F and G, that had no Plants in them, than in thofe 
H h that 
