One quibble I have with the piece is the quotes.

        There is a bark of an Englifh tree, which I have found by experience to be a powerful aftringent, and very efficacious in curing aguifh [agues] and intermitting diforders.


        My curiofity prompted me to look into the difpenfatories and books of botany, and examine what they faid concerning it; but there it exifted only by name. I could not find, that it hath, or ever had, any place in pharmacy, or any fuch qualities, as I fufpected afcribed to it by the botanifts.

If (as it appears) the author was unable to type in a long-S, he could at least have used a normal one, making the text more readable.

i.e. Englifh => English; aftringent => astringent; aguifh => aguish; diforders => disorders; curiofity => curiosity; difpenfatories => dispensatories; faid => said; exifted => existed; fuch => such; fufpected afcribed => suspected ascribed; botanifts => botanists