PNAS — Table of Contents — December 15, 1940, 26 (12)

December 15, 1940; 26 (12)

ZoÖlogy and Anatomy

ZoÖlogy and Anatomy:
- Mary E. Rawles
The Development of Melanophores from Embryonic Mouse Tissues Grown in the Coelom of Chick Embryos
Proc Natl Acad Sci U S A 1940 26:673-680
- Full Text (PDF)

Astronomy:
- Harlow Shapley
Galactic and Extragalactic Studies
Proc Natl Acad Sci U S A 1940 26:681-688
- Full Text (PDF)

Mathematics:
- Guido Fubini
A Remark on General Fuchsian Groups
Proc Natl Acad Sci U S A 1940 26:695-700
- Full Text (PDF)
Mathematics:
- Guido Fubini
The Distance in General Fuchsian Geometries
Proc Natl Acad Sci U S A 1940 26:700-708
- Full Text (PDF)
Mathematics:
- J. W. Calkin
Abstract Definite Boundary Value Problems
Proc Natl Acad Sci U S A 1940 26:708-712
- Full Text (PDF)
Mathematics:
- Marston Morse
- and C. B. Tompkins
Unstable Minimal Surfaces of Higher Topological Types
Proc Natl Acad Sci U S A 1940 26:713-716
- Full Text (PDF)