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.]

Woolworth Building. Swimming tank.

[Factory building, machinery on roof.]

Woolworth Building, swimming tank.

[Roof of building.]

Gas fired heating system in the Winchell residence, Fieldstone.

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

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

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.

[Factory building, structure on roof.]

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

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

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

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

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