CALENDAR OF ORNITHOLOGY FOR 1849. 
years and circumstances ; and however interesting tlie task, it would 
entail much time and labour to reduce them to any available order. 
If, then, the more important points in the economy of our native 
species could be registered on some simultaneous and regular plan, 
interesting information and details might be elicited, and an insight 
into the laws which regulate their motions and changes, he in a 
short time obtained. 
For the above purpose, a set of Tables have been prepared for 
the present, the concluding number of the “ Contributions for 1848,” 
in such time as will enable the month of January, with the next 
whole year, to be observed and registered ; and accompanying the 
number, there is a duplicate copy, printed on thin paper and with 
printed address, which it is requested may be filled up and posted 
in the first week of January 1850, when, if health and circumstances 
permit, a summary of the registers and observations returned will 
be drawn up and printed with an early succeeding number. 
For the better filling up of these tables, the following observations 
may not be inappropriate : — 
The tables have been drawn up, as far as possible, to suit any 
locality ; at the same time, many omissions may have been made, 
which experience in a future year may remedy, and there may be 
many things inserted which are not applicable, and may appear 
useless in certain districts. Thus, the return filled up in Orkney, 
vill produce a very different appearance from one made in the 
middle or southern districts of England. 
In these returns, it will be very desirable to know the elevation 
above the sea as nearly as possible; to have a general register of 
the temperature and weather, with a short description of the 
country the geological nature of the soil, and the character of 
its vegetation around the localities where the observations are 
ticulnr ^ cmious and interesting subject of migration, par- 
m s of on " 18 T d ' The aVe, ^° ^Perature at the 
r*enL?T' an f f departure ’ tlle direction of the wind; 
gencial character of the wenthoi* • « j«,. ■, 
Of vegetation, should all be observed It 
that the arrival of the mmratnJJ 1 gl ' 1C Supp0Sed ’ 
would he influenced more by the T°T ° ther 
they departed, than of that to Jr i ° f that fr ° m whlC1 
frost, or mild weather wool 1 l T ' they came ’ that an ear,,er 
30-20 ’ " 01,1(1 have effect of driving them away 
