Table 2 



O-s- 4,-/0 /1-1S Ib-lO V-IS 26-30 J7-JS ■ii-UO m-vs 4<rS0 SI-SS SiiO 6/-6S 66-70 7/-7S 



A/umbers of JD irds /Known 



Graphic representation of number of species of birds known by individual students. Data refer < nly 

 to species of birds listed in Table r. Data recorded for(I> 55 men: I Hi 71 women; (III) i2<> 

 men and women. Further explanation in text, page 274. 



