163 
was fixed, and the speck of white also, even 
when motions were made to draw the atten- 
tion of the bird to various directions ; imme- 
diately on the bird being set at liberty, the 
nictitating membrane performed its office, 
and wiped the drop away. As far as this ex- 
periment has been able to prove the fact, we 
feel satisfied that with respect both to the 
Tawny and White Owl the eyes are motion- 
less." 
