Smithsonian Report, 1963. — Meinel 



Plate 1 



1. The summer Milky Way photographed with an all-slcy camera in infrared Hght. 

 brightness at the horizon is due to the upper atmosphere airglow of the earth. 



The 



2. Image orthicon telescope picture of the \\ liirlpnol Xebula taken with an image orthicon 

 tube attached to the 20-inch reflector at the Organ Pass observing station of the Dearborn 

 Observatory. This picture would require a 100-inch telescope to photograph this object 

 in the same exposure time with ordinary photographic plates. 



