Drawing by R. W. Porter depicting an interior view of Mount Palomar Observatory showing the 200-inch telescope, looking north, 1938

Photograph of a drawing by R. W. Porter depicting an interior view of Mount Palomar Observatory showing the 200-inch telescope, looking north, 1938. In the center of the image, the 200-inch telescope points towards the sky while being supported by two large cyndrical beams that attach to form a U-shaped base that is slanted. The telescope is composed of beams connected in various triangular sizes and angles to form an almost perfect cylinder. On the top left of the image, a man stands at the edge of a platform over the telescope. To the right of center, a second man leans over the railing of a walkway. To the bottom right of the picture, a third man stnads at the base of the telescope. In the foreground, a fourth man stands in a balcony of what appears to be a control board for the telescope. Two other men can be seen climbing throughout the telescope.; Photoprint reads: "The 200-inch telescope, looking north. The 140-tone tube rests on declination trunnions carried by the two tubular girders which connect the yoke at the lower polar axis bearing with the large horseshoe at the upper bearing. Area of sky to be photographed will be quite small, say a patch having a dimension from 1/5 to 1/3 that of the full moon. Considered as a camera, the telescope will have a "speed" of f/3.3".