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HYDROELECTRIC STATION, GATUN. INTERIOR VIEW. JUNE, 1915.

PLATE 20.

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PART OF NORTH WING OF ADMINISTRATION BUILDING, BALBOA HEIGHTS, AND CAST-IRON LAMP-POST USED IN NEW STREET-LIGHTING SYSTEM.

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BALBOA HEIGHTS. VIEW ALONG ASPHALTIC CONCRETE UPPER HIGHWAY. JUNE, 1915.

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