SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 95. NUMBER 1 



IRoebling jfunb 



OBSERVING THE SUN AT 19,300 FEET ALTITUDE, 

 MOUNT AUNCONQUILCHA, CHILE 



BY 

 C. P. BUTLER 



(Publication 3 379) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



FEBRUARY 18, 1936 



