Horizontal window ventilighter, closed.

Vertical window ventilighter, closed.

Vertical window ventilighter, closed.

Simon Ventilighter Co. View of porch Ventilighter.

Idlewild Airport, hangars, horizontal detail and long windows

19 West 44th Street. Bed with headboard, open, horizontal.

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

385 Madison Avenue. Manhattan Savings Bank, horizontal front elevation, two windows and center door, daytime].

19 West 44th Street. Bed with curtain enclosure, open, horizontal.

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

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

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

View of Ventilighter under Queensboro Bridge, in market.

Detail of basement stories 210-212 East 21st Street showing open points in terra-cotta window frames.

Washable window.

Large kitchen cabinet, open.

Open stair apartments, construction.

[Window washers.]

Workhouse for Men, reception center, horizontal view on wing, S.W. corner.

[Men installing window.]