Book 3 — A Window Ventilator
Reading edition
A Removable Window Board to Raise Lower Sash for Ventilation between the Sashes
The illustration shows a ventilator I constructed to allow air to pass through between the upper and lower window sash. It consists of a board 8 or 10 in. wide, and as long as the window sash is wide. A short distance from one end it is marked and cut on a slant. The small piece removed is hinged to the main part so that it can be raised in taking the board from the window. When the sash rests on the board it cannot be removed from the window.—Contributed by David Hannigan, Orange, Connecticut.
