Front:
771
Allegheny Observatory, North Side, Pittsburgh, Pa.
7A-H2789
Back:
ALLEGHENY OBSERVATORY
(Near Entrance in Riverview Park)
In this world-renowned observatory have
been conducted many valuable experiments,
some of which resulted in progressive dis-
coveries.
MINSKY BROS. & CO. PUBLISHING DIVISION, PITTSBURGH, PA.
“C.T. ART-COLORTONE" REG. U.S. PAT. OFF.
مه
cm
