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

[Exhaust system on roof.]

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

Woolworth Building. Swimming tank.

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

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

129 Amsterdam Avenue. Raisler Heating Building.

[Factory building, structure on roof.]

View of lead flashing on roof of National Lead Co.

[Factory building, machinery on roof.]

Woolworth Building, swimming tank.

Gas fired heating system in the Winchell residence, Fieldstone.

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

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

[Roof of building.]

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

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

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

Sewage disposal plant, birds-eye view of disintegrating tanks, looking N.W. at open tanks.

Statler Hotel, birds-eye view from roof of Pennsylvania building on 33rd Street, looking S.E..