BIBLIOGRAPHICAL.



  I have thought it well to add a few notes on
the printed works of Audubon.
  His "Birds of America" occupies a unique
position among the valuable books of natural
history. Originally published in eighty-seven
parts, each containing five plates, it was later
put into the final form of four volumes, ele-
plhant folio, in a solid binding with red mo-
rocco back. The workmanship of printer and
binder are both worthy of the subject, and the
value of the book steadily increases. Thie
finest complete set of the plates in existence is
unbound, and was sold by Sotheran, the cele-
brated bookseller, in London, in i893, for the
sum of four thousand dollars. The bound
copies, according to condition, are now worth
from 1500 to 2500 a set.
  The text to this edition, entitled "Ornitho-
logical Biography," was published separately