t i5« ] 



SOME 



BRIEF INSTRUCTIONS 



FOR 



Etching or Engraving 



ON 



COPPER-PLATES, 



WITH 



AQ^UA FORTÏS. 



T N the courfe of my performing the engrav- 

 ing or etching of the copper-plates contained 

 in my Natural Hiftory, I received not only the 

 inftru6lions of my friends, but beftowed fome 

 pains to examine fuch authors as had wrote on 

 the fubjeâ: of etching with J(iua Fortis, 



I could find little or nothing on that fubjeS: 

 originally wrpte by any avithpr of our Qwn coun- 

 try i 



