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Abbot, Charles Greeley / The sun and the welfare of man
(1938)
Chapter II: From shore to desert mountains, measuring sun rays, pp. 10-40 ff.
![[page image]](http://images.library.wisc.edu/HistSciTech/EFacs/SmithsnSciSer/SunAbbot/M/0074.jpg)
Copyright 1929 by Smithsonian Institution Series, Inc.| For information on re-use, see: http://digital.library.wisc.edu/1711.dl/Copyright




