Some may perhaps query, Why did the Deity crowd the Surface of our Earth with ſuch a Number of different Sorts of Plants, many of whoſe Virtues we are entire Strangers to, if they have any; others we are uncertain of; others the fatal Experience of many has proved to be certainly noxious; and thoſe that we are beſt acquainted with, we cannot at all Times infallibly depend upon their ſalutiferous Effects; and, by late Diſcoveries from improved Microſcopes, we have Reaſon to ſuſpect that there are yet many Genuſſes and Species of minuter Vegetables ſtill undiſcovered?