Smithsonian Report. 1939. — Jones 



Plate 1 



I. Jupiter. Photographed in Ultraviolet light (Above) and in infrared 



LIGHT (BELOW). 



The markings shown are in each case atmospheric. 



2. Spectra of the Moon. Jupiter. Saturn. Uranus, and Neptune. 



The bands due to marsh gas, which become progressively stronger from Jupiter to Neptune, are marked at 

 the bottom. The faint marked band in the spectrum of Jupiter is due to ammonia. 



