OCTOBER, 1902. 
THE MIGRATION OF BIRDS. 
225 
II 130 to II 45 — in 3.4 — out 6.7. — Large wings; flight like bat. 
in 2.8 — out 6.4. — Tiny wing-strokes ; body 
large. Total 2. 
Madison, Wis., May 10, 1900. 
Meteorological Data. 
Wind — South ; velocity 12. 
Temperature — 58. 9°. 
Atmosphere — Cloudy. 
Total number of birds observed from 8:00 P. M. to 9:00 
P. M.— 4. 
8:00 to 8:15 — in 5.7 — out 7.7. — Swift. Size 2. 
in 3.2 — out 8.9. — Swift. Size Total 2. 
8:15 to 8:30 — in 1.3 — out 6.8. — Size 2. Out of focus; very 
close. 
in 3.7 — out 8.8. — Size 2. Same as preceding in 
good focus. Total 2. 
8 130 to 8 45 — Cloudy part of time. None. 
8 145 to 9 :oo — Cloudy most of time None. 
Stopped observations on ac- 
count of clouds. 
Madison, Wis., May 13, 1900. 
Meterological Data. 
Wind — South to South Southwest ; velocity 14. 
Temperature — 74. 9°. 
Atmosphere — Clear. 
Total number of birds observed from 8 150 P. M. to i :oo A. 
M. — 96. 
8:50 to 9:00 — in 4.1 — out 8.1 — Size i-|-. 
in 3.9 — out 8.3 — Size i — . 
in 4.5 — out 7.1 — Swift — Indistinct. 
in 4.1 — out 8.1 — Size i — Somewhat blurred. 
in 5.0 — out 7.1 — Size 
in 3.0 — out 1.9. 
in 3.1 — out 1.4 — Swift — Like a shot, 
in 4.5 — out 6.8 — Size 
in 4.5 — out 7.4 — Indistinct — Total 9. 
9:00 to 9:15 — in 5.0 — out 6.6 — Size 3. 
in 3.0 — out 8.9 — Size 2 — Out of focus, 
in 2.3 — out 8.8 — Size 2-|-. Out of focus, 
in 2.8 — out 8.8 — Size 2- 1-. Out of focus. 
