Tables of the value of all sorts of Pearls, Diamonds, Gold,

Silver, and other Metalls.[omitted from this edition]. I shall

not undertake to say, but that n the Tables of values, in these

mutable times, some variation may happen, to the common practice

of Artists, in that nature, whose private unmeasurable Ends are,

to some more their Gods than Justice or Honesty their Practise:

but the Grounds being herein plainly stated; a pregnant wit, with

a little Commerce, may soon rectify those diary Deceits, and for