NORTH AMERICAN CONCHOLOGY. 



2tT 



Say. — American edition of Nicholson's Encyclopedia, quoted 



on page 254 of Part I. 



Since the printing of page 254, I have met Avith a copy of the 

 fir:^t American edition of Nicholson's Encyclopedia, and find the 

 date of the volume containing Mr. Say's paper (Vol. II) to be 

 ISn, and not 1816 as I have stated. The following is the com- 

 plete title and accurate date of the various editions : — 



The First American Edition of the British Encyclopedia or Dictionary of 

 Arts and Sciences, comprising an Accurate and Popular View of the 

 Present Improved State of Human Knowledge : by Wu.liam Nicholsox, 

 &c. &c. Philadelphia: Samuel A. Mitchell & Horace Ames. Vol. I, 

 1S16 ; Vol. Il-VI, 181.7. 



The second edition contains 12 volumes, all bearing the date of ISIS, 



