The Bluebird oly, 
When the arrangements were completed, I waited 
for the house to be occupied. By March twentieth it 
had been inspected by many bluebirds, but none had 
decided to remain. Through the apparatus I had 
SECTION REMOVED SHOwInNG MicrROPHONE 
the pleasure of listening to bluebird conversations 
such as I had never heard before. As the birds were 
house hunting their notes were at times very spirited, 
and their quick movements were plainly indicative of 
excitement. 
