U. S. NATIONAL MUSEUM 



BULLETIN 162 PLATE 26 



Drumming of the Ruffed Grouse in Motion pictures 



Presented bj l>r. Arthur A. Allen. Frame l shows the fust thump; the stroke is forward and down- 

 ward. Frame 68 shows the eleventh tin imp, about the middle of the performance; note that the 

 Stroke is forward and upward. Referred to on page 1 I". 



