When the lanterns shone on the spinning reflectors after dark the 

 resulting flashes frightened all ducks away from the fields. Che ef- 

 fectiveness of the reflectors continued throughout the entire harvesting 

 season. By day the spinner reflectors alone were sufficient to protect 

 the crops completely. 



Ccats 



Revolving "beacons like that here described can be constructed at a 

 cost of about $5 each. If waste lumber or woodland poles are available 

 for the T- supports and if the spinner reflectors can be made as described 

 the cost will be largely dependent on the price of the swivels, The buck- 

 wheat fields in Michigan v/ere equipped with reflectors at a cost of about 

 50 cents an acre, and the swivels, which were the only items of appreciable 

 cost, lasted several seasons. 



