164 CAPT. S. R. DOUGLAS ON 



Table III. 



Year. 



No. of birds 

 marked. 



No. of birds 

 recovered. 



■ 



Dates tbe birds were 

 recovered. 



1910. 



33 



5 



1, Nov. 1910. 

 1, Feb. 1911. 

 1, Jan. 1912. 

 1, June 1913. 

 1, Jan. 1917. 



1911. 



48 



13 



6, Nov. 1911. 

 1, Dec. 1911. 

 3, Jan. 1912. 

 1, Jan. 1913. 

 1, June 1913. 

 1, Jan. 1914. 



1912. 



50 



8 



7, Dec. 1912. 

 1, Jan. 1914. 



1913. 



50 



12 



10, Jan. 1914. 

 1, Nov. 1916. 

 1, Jan. 1917. 



1914. 



0 



50 



8 



1, Nov. 1914. 

 1, Dec. 1914. 

 1 Feb 1915 

 1, April 1915. 

 3, May 1916. 

 1, Jan. 1917. 



1915. 



50 



3 



1, Nov. 1916. 



2, Jan. 1917. 



1916. 



50 



6 



6, Jan. 1917. 



The weights of the eight unringed birds were: — 10, 11, 11, 

 11*5, 11*5, 11*5, 11 '7.5, and 12*25 ounces respectively, giving an 

 average of 11*3 oz. 



Again on Jan. 15th, 1917, eight ringed and sixteen unringed 

 birds were shot. The weights of the ringed birds were : — 11*25, 

 12, 12*25, 12*25, 13, 13, 13*5, and 14*25 ounces respectively, 

 giving an average of 12*7 oz. 



Those of the sixteen unringed birds were :-^10*5, 11*5, 11*5, 

 11*75, 11*75, 12, 12, 12, 12*25, 12*25, 12*5, 13, 13, 13*25, 13*5, 

 and 14 ounces respectively, giving an average weight of 12*3 oz. 



The following day 31 unringed birds gave an average weight 

 of 12*1 oz. 



Although these numbers are not great, it is worthy of note 

 that on both occasions the average weight of the ringed birds 

 was greater than that of the unringed birds. 



These being the data obtained up to the present time, is it 

 justifiable to draw any conclusions from them ? 



The first point, and this may be taken as conclusively proved, 



