Front:
Horseshoe Curve
on the Pennsylvania Railraod's
East-West Main Line near Altoona, Pa.
Back:
This world-famed engineering marvel
wears a "new look" for its 100th birthday
in a history-making night photograph which
also marks the 75th anniversary of the in-
candescent lamp. To illuminate the 2,000,000
square-foot area, largest ever photographed
by this means, the PRR and Sylvania Electric
Products, Inc. used 6,000 photoflash bulbs,
equivalent in output to 15 million 60-watt
household lamps.
5C-H291
E. MADCIFF, HERSHEY, PA.
