OCTOBER, 1002. 
THE MIGRATION OF HIKDS. 
247 
3:3010 3:45 — in ... — out ... — Total 81. 
The birds were flying- in such rapid succession that I could 
not stop to take the direction. There were 81 birds counted, fly- 
ing from about 2 — 5 and 2 — 6. Of these about 15 were out of 
focus and flying in promiscuous directions. The moon was being 
obscured by the trees. The telescope made an angle of about 8° 
with the horizontal. 
Lake Forest, 111., May 11, 1900. 
Meteorological Data. 
Wind — Moderate ; Southwest. 
Temperature — Warm. 
Atmosphere — Partly cloudy. 
Total number of birds observed from 7:45 P. M. to 10:55 
p. M.-73. 
7:45 to 8:00 — in 4.0 — out 2.0. — Fast. Size 2. 
in 4.0 — out 2.0. — Fast. Size 2. 
in 4.0 — out 2.0. — Fast. Size 2. 
in 4.0 — out 2.0. — Fast. Size 2. This and all 
preceding out of focus, 
in 4.0 — out 2.0. — Fast. Size 2. Wing-strokes 
seen. 
in 4.0 — out 2.0. — Fast. Size 2. — Out of focus. 
Total 6. 
8:00 to 8:15 — in 4.0 — out 2.0. — Fast. Size 2. 
in 3.0 — out 2.0. — Fast. Size 2. 
in 3.0 — out 2.0. — Fast. Size 2. 
in 4.0 — out i.o. — Fast. Size 2. This and all 
preceding out of focus. 
Total 4. 
8:15 to 8:45 No observations taken. 
8:45 to 9:00 — in 4.0 — out 2.0. — Fast. Size i. Flight like a 
shot. Total I. 
9:00 to 9:15 — in 3.0 — out 2.0. — Fast. Size 2. Out of focus. 
Total I. 
9:15 to 9:30 — in 3.0 — out 1.0. — Fast. Size 2. 
in 4.0 — out 1.0. — Rather slow. Size 2. Wing- 
strokes seen, 
in 4.0 — out 2.0. — Fast. Size 2. 
in 2.7— out 4.2. — Slow. Size 3. Wing-strokes 
seen. Total 4. 
•9:30 to 9:45 — in 4.0 — out 2.0 — F^st. Size i. 
in 3.0 — out T.o. — Slow. Size 2-|-. 
