and the press having
led to a second edition being called for within a year of its first
publication, I have taken the opportunity to make a few necessary
corrections. I have also added a few passages to the 6th and 7th Essays,
and have given two notes, explanatory of some portions of the last
chapter which appear to have been not always understood. These additions
are as follows:--

+-------------------------------------------------------------------+
| _To avoid altering the paging the additional pages now given have |
| been lettered._ |
+---------+---------+-----------------------------------------------+
| 1st Ed. | 2nd Ed. | |
+---------+---------+ |
| 221 | 221 | Additional facts as to birds acquiring |
| | | the song of other species. |
| | | |
| 223 | 223A } | Mr. Spruce's remarks on young birds |
| | 223B } | pairing with old. |
| | | |
| 228 | 228A } | Pouchet's observations on a change |
| | 228B } | in the nests of swallows. |
| | | |
| 229 | -- | Passage omitted about nest of Golden |
| | | Crested Warbler, which had been |
| | | inserted on Rennie's authority, but |
| | | has not been confirmed by any later |
| | | observers. |
| | | |
| 261 | 261 | Daines Barrington, on importance of |
| | | protection to the female bird. |
| | | |
| | 372 | Note A. |
| | | |
| | 372B | Note B. |
+---------+---------+-----------------------------------------------+

CONTENTS.

I.--_On the Law which has regulated t