SECTION III. 77 



The common Cowry, in like manner, 

 is worked down to a fine violet. 



The Nautilus, like many trochi, fnails, 

 and other Shells, works down to a fine 

 mother of pearl ; but, if only cleaned, 

 it is fullied white, with large fallow or 

 yellowifh rays. 



The Sea-Ears alfo work down to mo- 

 ther of pearl, w^hereas, w^hen only po- 

 liftied, they are finely clouded brown, 

 white, green, &c. 



Many of the Limpets, when worked 

 down, w^ear a very different appearance to 

 what they do when only polifhed. 



Several other fuch examples may be 

 brought : but I neither applaud this, nor 

 many other proceffes and frauds, that are 



daily 



