I 



Bales — On Feathers of Wild Ducks. 323 



drochloric acid, the chloride of iron is formed, when, upon the 

 addition of the dihite potassium ferro-cyanide, the blue color 

 is shown, indicating that the ferro-cyanide of iron is present, 

 thus completing the test and proving without doubt that iron 

 is present. 



All specimens of ducks that have come under my observa- 

 tion have been taken during the spring migration, and, to my 

 mind, at least, the discoloration is due to iron "in the water 

 frequented by the ducks" in their winter quarters. 



CiRCLEVILLE, OhIO, NoV. 1. 1909. 



A LAST ATTEMPT TO LOCATE AND SAVE FROM 

 EXTINCTION THE PASSENGER PIGEON. 



Through the interest and generosity of Col. Anthony R. 

 Kuser, I am able to offer the following award : 



Three Hundred Dollars ($300) for information of a nest- 

 ing pair of wild Passenger Pigeons (Ectopistes migratoria), 

 Undisturbed. 



Before this award will be paid such information must be 

 furnished (exclusively and confidentially) as will enable a 

 committee of expert ornithologists to visit the nest and con- 

 firm the finding. If the nest and parent birds are found un- 

 disturbed the award will be promptly paid. 



(Signed) C. WILLIAM BEEBE. 



Until January Lst, 1911, during Dr. Beebe's absence from 

 America, all information concerning the existence of Passen- 

 ger Pigeons should be sent to C. F. Hodge, Clark University, 

 Worcester, Mass. 



In making this oft'er Col. Kuser withdraws his former of- 

 fer of One Hundred Dollars ($100) for a freshly killed Pas- 

 senger Pigeon. He does this because of the great danger of 

 complete extermination. 



