MIDDIEE OF MAY 105 
home and photographed it with another— 
that of a house sparrow—which I found in 
my garden, and which was also very evenly 
itaetured. i suppose the mstimct of the 
PLATE XXX: Eggs of thrush and sparrow ‘ very 
evenly fractured’ in the hatching. (Full size.) 
little unhatched bird when fully developed 
impels it to get out of the shell, to breathe, 
pile welibark upom the sea. of life.) So.it 
pecks away with all the might of its little 
beak (Gwhich must already be fairly hard) 
until released. Cramped up as it is in its 
small prison it cannot change its position, 
and can only turn round in one direction. 
