166 



ANNUAL REPORT SMITHSONIAN INSTITUTION, 1933 



PiGDRE 8. — Autographic balloon pyrheliometer and barograph. A photographic record of 

 solar radiation and barometric pressure was obtained at 15 miles elevation. 



«/.8 



J '-7 





J.6 



^FrecBdlloon. 

 ' July II 19/4. 



Ocm. H9. 



4 ^ Pep pi er,Bsilloon. 



20 



^Aiie 



\Ml.WhItmif. 



6j0 



Allot, /',t-WtlsoM. 

 " Mix. 



WL,^ 



Ma 



_S}Q 



Bdrometer. 

 FiGUEB 9. — Pyrheliometry from earth's surface up to the stratosphere. 



