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A Quantitative Study of the Nocturnal Migration of Birds
George H., Jr. Lowery
How do you count birds flying unseen in the dark? George Lowery aimed a telescope at the moon and tallied the silhouettes crossing its face. This ingenious study measures the great nocturnal migration by the shadows passing overhead. A clever milestone in the science of bird movement. Discover how the night sky gave up the secret of migration.
Every copy includes a printable PDF edition, a beautifully typeset book you can print, mark up in the margins, and keep on your shelf. Yours the moment you own it.
114 chapters
- 1[Cover]
- 2[Pg_361]
- 3[Pg_362]
- 4[Pg_363]
- 5[Pg_364]
- 6[Pg_365]
- 7[Pg_366]
- 8[Pg_367]
- 9[Pg_368]
- 10[Pg_369]
- 11[Pg_370]
- 12[Pg_371]
- 13[Pg_372]
- 14[Pg_373]
- 15[Pg_374]
- 16[Pg_375]
- 17[Pg_376]
- 18[Pg_377]
+ 96 more. The full contents open with the book.
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