74 CONCHOLOGY, 



.efFefts the acid has had. It is alfo ue^ 

 ceffary tocover with wax all the fine points 

 or dehcate parts of the Shell, to hinder the 

 acid from any-wife corroding or hurting 

 them : after which the whole Shell is 

 poliihed with fine emery, and paffed over 

 with gum-water, or whites of eggs. 



A Shell of a fmooth furface, or that 

 is not very rugged, warted, or fet w^ith 

 fpikes, proceffes, &c. and which naturally 

 has fome {light politure, though dull or 

 deadifh, {hould only be rubbed with 

 chamois leather by the hand. It will 

 then become bright or glolfy, efpecially if 

 a little very fine tripoli is ufed. Indeed, 

 powder of emery (hould not be often ufed, 

 for it works rather too rudely. How- 

 ever, all thefe operations mull: be ufed and 

 adapted to the circumftanccs, otherwife 

 they dcftroy or hurt the colours, and the 

 fine workings on the Shell. 



When 



