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Mufic, for example, is an art, a liberal 
art. Cramer in executing a difficult concerto, 
whether of his own compofition or not, is 
a wonderful artift; but refpe6ling his com- 
pofitions, or his cadences, when really ex- 
temporaneous, or invented, he ranks with 
men of fcience. In like manner, a painter, 
who does nothing more than copy objects 
before him, is a mere artift: he is a man of 
fcience only in proportion to his difplay of 
his knowledge of Nature. A poet may alfo 
be confidered as a mere artift, when his fole 
merit is the accuracy of his verification. 
When you have leifure to confult the writ- 
ings of philofophers, particularly Ariftotle 
and his followers, you will find that they 
have fo perplexed themfelves in their difi- 
nition of Arts and Sciences, as to render it 
impoflible to diftinguifh one from the other. 
The difinition of Arts, which I have given 
you above, may be,ftricl:ry, applicable to me- 
chanical Arts only: this however, is fuffi- 
cient for our prefent purpofe. 
1 am, dear Charles, &c. 
B 2 LET- 
