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Contributed by Smithsonian Institution Archives.
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Transcription
7.0.
LEGEND
FIGURE 2: GEOGRAPHICAL VARIATION IN BIRD DENSITY
6.0.
- 1st cruise leg ca. 118.5°W
- 2nd " " " 111.5°W
- 3rd " " " 104.5°W
- 4th " " " 97.5°W
Center of rectangle equals
Now position of ship.
5.0.
4.0.
3.0.
2.0.
1.0.
GIRDS PER SQUARE MILE
29°N 25° 20° 15° 10° 5° 0° 3°S
LATITUDE
[illegible]