$n Of Vegetation. 
found to abound with Oil, and confequently 
with fulphur and air, as we fee by Exper. 56, 
57, 58. which Seeds containing the rudi- 
ments of future vegetables, it was neceffary 
that they fhould be well ftored with princi- 
ples that would both preferve the Seed from 
putrefa&ion, and alfo be very a&ive in pro- 
moting germination and vegetation. Thus 
alfo by the grateful odours of flowers we 
are affured, that they are ftored with a very 
fubtilc, highly fublimed Oil, which per- 
fumes the ambient air , and the fame 
may be obferved from the high taftes of 
fruits. 
And as Oil is an excellent prefervative 
againft the injuries of cold, fo it is found 
to abound in the fap of the more northern 
trees ; and it is this which in ever-greens 
keeps their leaves from failing. 
But plants of a lefs durable texture, as 
they abound with a greater proportion of 
Salt and Water, which is not fo ftrongly 
attra&ing as fulphur and air, foare they lefs 
able to endure the cold 5 and as plants are 
obferved to have a greater proportion of 
Salt and W ater in them in the fpring, than in 
the autumn, fo are they more eafily injured 
by cold in the fpring, than in a more advan- 
2 ced 
