View of heating system for water tanks on roof of building, outside.

[Exhaust system on roof.]

New York Telephone and Telegraph Building, view of statue on roof.

[Heating control valve on 17th floor of unidentified building.]

[Factory building, machinery on roof.]

Woolworth Building, swimming tank.

Woolworth Building. Swimming tank.

[View from roof of unidentified building, Empire State Building in distance.]

[Factory building, structure on roof.]

Woolworth Building, basement room over swimming tank, view from entrance.

[Roof of building.]

Gas fired heating system in the Winchell residence, Fieldstone.

View from Woolworth Building roof looking at S.W. corner of building.

129 Amsterdam Avenue. Raisler Heating Building.

View of lead flashing on roof of National Lead Co.

Woolworth Building. Looking N.E. toward Municipal Building on roof.

National Lead Company. View of lead flashing on roof

Metropolitan Building, view looking north along roof-houses, etc.

1749 York Avenue. Buildings, garage, etc., views inside and out.

Woolworth Building. Looking up at tower on roof.