PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 51 



Table of Measuremenis. 



Washington, A})ril 1, 187 



ON THE BIRDS OF HEldaOKiAND. 



By H. GATKE. 



Heligoland, Marcli 8, 1870. 

 Professor S. F. Baird, 



Secretary Smithsonian Institution : 

 Dear Sir : I have delayed answeriug your very kind communication 

 till I miglit be able to inform you of the receipt of the box despatched 



