Front:
COMET BROOKS OF 1911 FROMA NEGATIVE MADE WITH THE
BRUCE PHOTOGRAPHIC TELESCOPE,
YERKES OBSERVATORY, UNIVERSITY OF CHICAGO,
WILLIAMS BAY, WISCONSIN.
THE COMET WAS 66 MILLION MILES DISTANT FROM THE EARTH.
THE SMALL STREAKS ARE TRAILS OF STARS.
Back:
Со
22177
-MADE IN U.S.A. BY E. C. KROPP CO., MILWAUKEE. WIS
