Vertical window ventilighter, closed.

Horizontal window ventilighter, closed.

Horizontal window ventilighter, open.

Simon Ventilighter Co. View of porch Ventilighter.

View of Ventilighter under Queensboro Bridge, in market.

Machine closed.

30 East 42nd Street. Sample window taken at office, light metal casement sash, closed.

37th Street and 5th Avenue. Ventilighters in the Franklin Simon Store.

Antique silver ship on wheels, vertical.

53rd Street and 6th Avenue. New York Hilton Hotel, close-up detail, section of windows.

Hotel Pennsylvania. N.Y.C. Simon Ventilighter Co.

Double bed, vertical bar type, fully open.

[Window.]

34 West 34th Street. Sulka Store, Ventilighter in interior.

West 57th Street. Consolidated Gas Co. office interior. Ventilighter.

Washable window.

Verrazano-Narrows Bridge, vertical view of bridge at dusk.

Clary-Reel Oven, bread oven, closed.

Sewage disposal plant, disintegrating tanks, closed.

[Sixth Avenue El train station closed.]