19 ^ 
ON THE CLASSIFICATION OF BIUDS. 
PART II. 
ON THE BIBLIOGBAPHY, NOMENCLATURE, AND 
PRESERVATION OF BIRDS. 
CHAPTER I. 
AN ENUMERATION OF THE CHIEF WORKS ON ORNITHOLOGY, 
WHTH CRITICAL AND EXPLANATORY REMARKS. 
(l 64 .) As it is our wish to render this volume of our 
ornithological treatise as complete an introduction to 
the science as is requisite for all scientific and practical 
purposes, we shall, in the following pages, touch upon 
some few points upon which the student will desire in- 
formation. The view we shall now take of the Biblio- 
grapliy of Ornithology will bring before him those works 
most essensial to possess or to consult, and this will 
naturally lead to some observations on the present state of 
the science. We shaU then, under the head of nomen- 
clature, enumerate those “ rules and regulations,” most 
of which, by having the sanction of the highest names 
in zoological science, are already considered as aphorisms. 
Lastly, we shall give such concise and practical directions 
for the preservation of birds as will enable any one to 
commence a collection, however far he may lie removed 
from civilised countries, and from the means of acquiring 
the niceties and elaborate processes of Taxidermy. AU 
these subjects are intimately connected with this intro- 
duction to the science ; which is addressed, alike, to the 
philosophic ornithologist, the student, and the amateur. 
(165.) To form a just estimate on the state of any 
branch of natural history at a given period, it is neces- 
